Here is a list of open source Linux drivers that are already written, but are not included in the main Linux kernel.org tree for one reason or another. These are all possible projects that the Linux Driver Project developers could undertake to move the driver into the main kernel tree.

Note, please do not list closed source drivers here, or ones that contain some kind of licensing issue that prevents them from being merged into the Linux source tree due to a legal issue. If no open source driver exists for the same hardware, please add an entry on DriversNeeded if one does not already exist.

Drivers by subsystem and type

Firewire

• a list of out-of-tree FireWire drivers http://wiki.linux1394.org/Links/Software/OutOfTreeDrivers
• PCILynx driver needs to be ported to the new FireWire stack (code-named Juju).

Networking

Fixed Ethernet

• Chelsio TOE and RDMA support for Terminator 3 (T3) family Ethernet Adapter drivers S310E S320E S320X and R310E. Networking maintainers do not want support for this class of hardware in kernel. See http://service.chelsio.com/ and http://service.chelsio.com/site-bin/readme.cgi?FILE=linux/t3/README-cxgb3toe
• linmodem - winmodems with Lucent Apollo (ISA) and Mars (PCI) chipsets http://linmodems.technion.ac.il/

Wireless 802.11

• ACX wireless driver - Homepage: http://acx100.sourceforge.net/ Wiki: http://acx100.sourceforge.net/wiki/Main_Page. See also the kernel inclusion section in the project's wiki for some background information on the previous attempt to include the driver in the mainline kernel.
• D-Link DWL G122: driver written by RalinkTech? (RT2500USB? - does not work very well) , source: http://www.ralinktech.com/ralink/Home/Support/Linux.html .
• RaLink? RT2860 PCI (driver written by RalinkTech? ) (compiles and works, but has some bugs) , source: http://www.ralinktech.com/ralink/Home/Support/Linux.html .
• Atmel at76c50* in PCMCIA and PCI has a driver in-kernel, but it does not support WPA-CCMP (the SUITE_CIPHER_AES constant is there but unused); out-of-kernel drivers do support it, but they have been rotting since 2004. I at least thought it was worth mentioning.
• 3Com 11 Mbps Wireless Lan PC Card (3crwe62092a) as used in model WL-305 http://www.xs4all.nl/~bvermeul/swallow/ or http://sourceforge.net/projects/poldhu, These drivers I find are difficult to compile.

Controller Area Network (CAN, ISO 11898)

• pcan http://www.peak-system.com/linux/index.htm Peak-System Technik CAN interfaces (ISA, PC/104, parport, PCI, PCMCIA, USB, PC/104plus, embedded variants)
• lincan http://www.ocera.org/download/components/WP7/lincan-0.3.3.html

Misc

• iBurst http://sourceforge.net/projects/ibdriver http://en.wikipedia.org/wiki/Iburst
• mISDN http://www.misdn.org/
• The Zaptel (DAHDI) drivers for the Digum telephony interfaces http://ftp.digium.com/pub/zaptel/ . Now called DAHDI, available at http://downloads.digium.com/pub/telephony/dahdi-linux-complete/
• NDISWrapper http://ndiswrapper.sourceforge.net/ - implements Windows kernel API and NDIS API within Linux kernel. mostly acting as a compatibility layer to be able to load proprietary windows drivers when there is no Linux driver available. Not sure if any kernel developer wants this in mainline at all, so it`s just being listed for completeness here.
• kclown_spy http://clownix.net/ This kernel module permits the display of real-time plots for bandwidth of tcp/udp connexions and for qdiscs monitoring.
• l7-filter http://l7-filter.sourceforge.net/ Linux layer 7 packet classifier
• Pulsar ADSL card http://sourceforge.net/projects/openadsl/
• IMQ http://www.linuximq.net/. IFB was added to mainline to provide similar functionality as IMQ but didn't go all the way thus IMQ is still being used.
• openadsl - Pulsar PCI ADSL card driver http://sf.net/projects/openadsl
• bewan-adsl - Bewan ADSL PCI & USB st driver http://www.bewan.com/
• ipp2p - netfilter module for dealing with P2P? applications http://www.ipp2p.org/index_en.html
• arpstar - ARPStar kernel module for protection against arp poisoning http://arpstar.sourceforge.net
• htbinit - Sets up Hierachical Token Bucket based traffic control (QoS? ) with iproute2 http://www.sourceforge.net/projects/htbinit
• ksb - kernel SOCKS bouncer http://ksb.sourceforge.net/
• noarp - kernel module for hiding network interfaces http://www.masarlabs.com/noarp/
• portbunny - kernel based highspeed TCP SYN port scanner http://recurity-labs.com/portbunny/

Storage

• Oracle ASMLib Kernel Driver http://oss.oracle.com/projects/oracleasm/

ATA

• Promise Technology "FastTRAK" SX4000 ATA Raid controller -- There is a partial source driver for 2.4 kernels at http://www.promise.com/upload/Support/Driver/5_ftsrc-b25.tgz but like the SX6000 driver it also has not been updated since 2003 and will not build for 2.6 kernels.
• Highpoint RocketRAID? 3xxx ATA RAID controller -- There is a driver for 2.6 kernels at http://www.highpoint-tech.com/USA/bios_rr3520.htm#opensourcedriver. I have not tested this driver, but it is properly GPLd without any nasty binary surprises.

Card Readers

• O2Micro OZ711MS1/!OZ711MP1 controller, a card reader for MMC/SD/MS Pro, more info, driver for pre-2.6.17-series kernel
• sdricoh_cs mmc/sd-cardreader http://sdricohcs.sourceforge.net/
• Neuros SD/MMC card readers (davinci.c, dm320_mmc.c, itomap2430_hsmmc.c, omap24xx_mmc.c, omap2430_hsmmc.c, etc). http://www.google.com/search?hl=en&lr=&q=+site%3Asvn.neurostechnology.com+mmc&btnG=Search
• http://www.musclecard.com/sourcedrivers.html Smart Cards readers drivers

SCSI

• Accusys SCSI raid driver http://uwsg.iu.edu/hypermail/linux/kernel/0710.2/2783.html
• Feral QLogic Combined Target/Initiator driver http://www.feral.com/isp.html
• ATARI SCSI (ACSI)1, 2 need to be ported from 2.4 kernel
• AEC-671X SCSI adapter driver (atp870u), was working in 2.4 kernel, broken in 2.6.
• ppSCSI, drivers for various parallel-port-to-SCSI chips, so your parallel-port-connected device shows up as a SCSI device. 2.6 version here: http://penguin-breeder.org/kernel/download/
• vscsihba - Virtual SCSI HBA Project http://vscsihba.aboo.org/
• cdemu-vhba - emulates SCSI HBA for cdemu project http://sourceforge.net/mailarchive/forum.php?thread_name=4661CC59.4030909%40email.si&forum_name=cdemu-devel

iSCSI

• iscsitarget "iSCSI Enterprise Target". Note that the [[FAQ says that "Kernel patches are not necessary.", but this does not mean that kernel modules do not exist. The FAQ answer seems to exist to contrast iscsitarget against the older project it forked from, which required a patch to the kernel itself in addition to modules it supplied.
• iSCSI-SCST http://scst.sourceforge.net - a forked version of IET (iSCSI Enterprise Target) - bugfixes, performance improvements and new features (pass-through support for tape drives etc.).
• Note: both of these probably are hard to sell, since stgt was merged upstream in kernel 2.6.20.

Tape

• lin_tape driver for IBM scsi/fc tape drives and libraries, open-source rewrite of the older proprietary IBMtape driver
• FTape driver, 1, 2
• HP Colorado Trakker tape driver

Disk encryption

• TrueCrypt for Linux
• loop-AES (uncooperative with kernel developers)
• BestCrypt for Linux (incompatible license?)

USB

• Driver for spcp8x5 USB to serial adaptor. Used in ACT Solutions HomePro? /Zwave controller ZCU201.
• at76c503a - wireless usb driver for Atmel at76c503 chips http://developer.berlios.de/projects/at76c503a/ -- can this be merged with the at76_usb driver in staging? Is it the same driver?
• eagle_usb - Eagle Chipset powered ASDL modem http://www.eagle-usb.org/

Video Input

Web Cams

• another webcam driver http://qce-ga.sourceforge.net/
• Divio NW802 and related (various cameras, various chipsets). SF project very infrequently updated
• Logitech Trash.MainQuickCam Express driver for several Trash.MainQuickCam webcams, see http://sourceforge.net/projects/qce-ga/. Note that the website is out of date with the SF.net Project pages.
• WisChip (now Micronas) go7007 chipset for various video capture devices including the Plextor ConvertX series of USB devices. A GPL'd driver exists, originally written by WisChip, but it is no longer maintained and needs to be worked into mainline. See: http://oss.wischip.com/ and http://nikosapi.org/wiki/index.php/WIS_Go7007_Linux_driver.
• Ricoh Webcam Ry5u870: 05ca:1830, 05ca:1832, 05ca:1833, 05ca:1834, 05ca:1835, 05ca:1836, 05ca:1870, 05ca:1810. There is a working driver http://avilella.googlepages.com/r5u870-0.10.0.tgz but needs to be incorporated in the mainstream kernel.
• Webcams with the ALI M5603C? and M5602 chipset. There is a driver, but it doesn't work quite well, and I think it would need some love: http://sourceforge.net/projects/m560x-driver/. These chipsets are used in some built-in webcams.
• Syntek DC-1125 driver aka stk11xx. Not merged yet due to problems with bayer conversion and scaling not separated to v4l.
• spca5xx - spca5xx driver for webcams http://mxhaard.free.fr/spca5xx.html -- isn't this driver in/going into mainline?
• ov511-new - adds additional decompression to the existing ov511 driver (ubuntu kernel) -- same as ov51x-jpeg? If so may not be suitable for in-kernel, see: http://www.rastageeks.org/ov51x-jpeg/index.php/Main_Page
• Microdia webcams (0c45:xxxx) - driver at http://groups.google.com/group/microdia/

V4L

• V4L driver for Matrox Marvel G200-TV and G400-TV
• RivaTV: Enables video-in TV tuners that come with nVidia graphics cards.
• http://www.jusst.de/hg/mantis Video capture from Mantis based DVB cards (Found link here: http://linuxtv.org/wiki/index.php/TerraTec_Cinergy_C_DVB-C)
• http://www.linuxtv.org/v4lwiki/index.php/Trident_TM6000 The TV-Master TM6000 is an integrated Video decoder and USB bridge IC from Trident. There is an experimental patch, but is has not been included in tree, and doesn't compile with the latest kernels.
• ivtv - ivtv driver for Hauppauge PVR PCI cards http://www.ivtvdriver.org

Video Output

• device3dfx kernel driver for Voodoo boards svn://sf.net/projects/glide
• mga_vid driver for Matrox cards
• radeonfb ATOM BIOS parser and support for newer cards http://lwn.net/Articles/215965/ http://thread.gmane.org/gmane.linux.kernel/530781
• DXR3 & Hollywood plus Mpeg2 Decoder card http://dxr3.sf.net/
• radeonlcd http://fdd.com/software/radeon/

Audio

• hardsid driver http://hardsid.sourceforge.net/
• snd_bt-sco - bluetooth SCO sound driver (ubuntu kernel)

Input Devices

• Acer hotkey driver http://www.cakey.de/acerhk/ (Does not work on x86-64 because it calls 32 bit protected mode BIOS routines; it can't be ported to libx86 because this can currently only make 16 bit real mode BIOS calls) (Ubuntu and Mandriva kernels)
• ATI Remote Wonder Plus http://mythtv.wbond.net/remote_wonder_plus_linux/
• Creative DXR2 http://sourceforge.net/projects/dxr2 (only works on linux-2.4)
• Panasonic hotkey driver http://www.da-cha.jp/letsnote
• lirc http://www.lirc.org and the lirc drivers for Hauppauge cards at http://ivtvdriver.org
• Synaptics USB driver for cPad and other USB touchpads
• Wacom driver http://linuxwacom.sourceforge.net/ This driver is in the kernel
• lmpcm_usb - Logitech mediaplay cordless mouse driver (ubuntu kernel)

Multiport Serial Devices

• Digi RealPort (dgrp) ethernet-connected multiport console/serial servers ... out-of-tree driver since 1999.
• (dgap) Digi AccelePort? C/X, XEM, Xr and EPC/X driver
• (dgdm) Digi AccelePort? RAS and XP driver
• (dgnc) Digi Neo and ClassicBoard? driver
• espx driver - Equinox/Avocent ESP-series serial-over-ip devices
• eqnx/sst driver - Equinox/Avocent SST multiport serial driver

Data acquisition / custom device control

• comedi http://www.comedi.org/ - "The Comedi project develops open-source drivers, tools, and libraries for data acquisition."
• dmx4linux http://llg.cubic.org/dmx4linux/ (like midi, but for lighting)
• GPIB/IEEE488 USB Controller, model NI GPIB-USB-HS by National Instruments. http://linux-gpib.sourceforge.net/
• linuxclc http://sourceforge.net/projects/linuxclc/ - "This is a Linux 2.4 driver for ISA, PC-104 and serial Indramat CLC cards for SERCOS motion control."
• camac http://www.ifh.de/~ole/camac/ Wiener CC-16 ISA-CAMAC, Jorway J73A? SCSI-CAMAC controllers, and a few others
• ccp http://psux1.kek.jp/~kohama/ccp/ccp.html CAMAC, TKO and Fastbus driver for Hoshin CCP-IBM(ISA) controller
• camdrv http://www.awa.tohoku.ac.jp/%7Esanshiro/kinoko/camdrv/index.html CAMAC driver for CC/7700-PCI,CC/7700-ISA,CC/7000-ISA,CCP (PCI/ISA),CCP (PCI-2703A)
• k2927/k2915/acc_unidaq http://www.elc.nias.ac.jp/~daq/software/ drivers for various KineticSystems? CAMAC cards

VME

• SIS1100/SIS3100 PCI to VME interface (VME is a bus architecture popular in high-end physics labs and mission-critical systems) - the existing Linux source can be found at http://www.struck.de/linux1100.htm
• vmedrv is a device driver for Linux 2.x for the PCI-VME bus adapter Model 616/617/618/620 manufactured by SBS Technologies (Bit3).

Test/development cards

• ex10 ex10_i2c ex10_spi Modules for Amfeltec eX10 PCI Extender, GPL, included on accompanying CD only.

ACPI Support

• Experimental Toshiba ACPI Driver (needed for Toshset to control fan speeds, LCD brightness, etc.) http://memebeam.org/toys/ExperimentalToshibaAcpiDriver
• acpi4asus - http://sourceforge.net/projects/acpi4asus
• acer_acpi - Acer hardware control http://code.google.com/p/aceracpi
• fritzacpi - SuSE? 's 2.6 AVM kernel modules for fcclassic, fcpci, fcpcmcia, fcpnp, fcusb, fcusb2, fxusb_CZ, fxusb, e2220pc and e5520pc http://www.avm.de/ ftp://ftp.suse.com/pub/suse/i386/10.1/SUSE-Linux10.1-Beta3-Extra/suse/x86_64/km_fritzacpi.*

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Non-Driver modules outside of the kernel tree

Filesystems

• cloop "compressed loop" driver
• squashfs http://squashfs.sf.net/
• reiser4
• NILFS http://www.nilfs.org/
• btrfs http://oss.oracle.com/projects/btrfs/
• unionfs http://www.am-utils.org/project-unionfs.html Not in mainline yet, but part of andrew morton`s -mm tree.
• YAFFS NAND flash filesystem
• novfs - Novell Filesystem
• aufs
• gfs
• gnbd - gfs network block device
• fusion proc filesystem - http://directfb.org/wiki/index.php/Fusion_Proc_Filesystem
• openafs - OpenAFS? distributed filesystem http://www.openafs.org/
• shfs - Secure Shell File System http://shfs.sourceforge.net/

(This may not be the right category for the following)

• uloop - kernel driver for implementing loopdevice in userspace. http://aufs.cvs.sourceforge.net/aufs/aufs/sample/uloop/00readme.txt?view=log
• dm-userspace - similar to uloop, but different, device-mapper-style implementation. http://wiki.xensource.com/xenwiki/DmUserspace
• cowloop - copy-on-write loop driver to be used on top of any other block driver. http://www.atcomputing.nl/Tools/cowloop/
• dm-bbr - Bad Block relocation target (gentoo kernel)
• cdemu - mount bin/cue cd images

Network Block Devices

• DRBD
• Enhanced Network Block Device (enbd)
• GNBD
• vblade-kernel for exporting blockdevices via AoE? (ATA Over Ethernet)
• kvblade ditto, but different implementation

LSM (Linux Security Modules)

• AppArmor http://opensuse.org/Apparmor/
• Dakuzo http://www.dazuko.org/
• LIDS http://www.lids.org/
• MultiADM http://jengelh.medozas.de/projects/multiadm/
• SMACK Simplified Mandatory Access Control Kernel http://kerneltrap.org/Linux/Simplified_Mandatory_Access_Control_Kernel
• TOMOYO Linux http://tomoyo.sourceforge.jp/
• TALPA http://sourceforge.net/projects/talpa/ Intercepts file accesses and allows userspace daemons to vet them. Part of Sophos security products. Please mind discussion thread at http://marc.info/?l=linux-kernel&m=119625408226843&w=2

(This may not be the right category for the following)

• grsecurity, gadmin and PAX http://grsecurity.org/
• McAfee? LinuxShield?
• Sophos AntiVirus?

Virtualization

• kqemu driver http://fabrice.bellard.free.fr/qemu/
• VirtualBox virtualization drivers
• various VMware drivers as part of the open-vm-tools package
• Mac On Linux - http://mac-on-linux.sf.net/
• kquemu
• virtualbox

Architectures

• Linux/98 project: Linux for the PC-98 NEC architecture 1, 2
• NEC Osprey board (vr4181) 1
• Linux Tiny patchset to minimize memory footprint and enable booting on embedded and old i386 devices (maintained by Sony)
• http://git.kernel.org/gitweb.cgi?p=linux/kernel/git/jbglaw/vax-linux.git;a=summary Vax port
• DENX tree for various embedded architectures: http://www.denx.de/en/Software/GIT

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Uncategorised

• Catweasel Advanced Floppy Controller driver http://www.soundtracker.org/raw/cwfloppy/
• Catweasel i/o device drivers... driver for the joystick/mice/keyboard parts (sid part is covered by compatible hardsid, see Audio section), see above for the floppy controller part http://llg.cubic.org/cw/
• omnibook kernel driver http://sourceforge.net/projects/omnibook
• parallel port hardware http://www-stud.ims.uni-stuttgart.de/~voegelas/pcf.html
• speakup http://www.linux-speakup.org/
• Texas Instruments UltraMedia? Firmware Loader http://penguin-breeder.org/kernel
• PJB100 mp3 player http://openpjb.sourceforge.net/ with patches for recent kernels appearing at http://tech.groups.yahoo.com/group/PJB100-mp3/
• ATOP process counters http://www.atcomputing.nl/Tools/atop/kernpatch.html
• LTTng http://ltt.polymtl.ca/
• http://rick.vanrein.org/linux/badram/ provides support for damaged RAM
• appleir -- obsolete? LIRC is recommended for apple remotes
• mmio-xi
• oms
• rspiusb
• heci (ubuntu kernel)
• gc-usb (ubuntu kernel)
• rfkill (ubuntu kernel) -- already in mainline? See Documentation/rfkill.txt in the current kernel tree
• tlsup (ubuntu kernel)
• via_chrome9 (ubuntu kernel)
• fasm7400 - rf kill switch for Fujitsu Siemens Amilo M7400 laptop (ubuntu kernel)
• thinkpad_ec - thinkpad embedded controller lpc3 functions, will not be accepted upstream due to authorship issues (written by an anonymous developer). (ubuntu kernel)
• tp_smapi - thinkpad SMAPI support, will not be accepted upstream due to authorship issues (written by an anonymous developer). (ubuntu kernel)
• oracleasm
• SGI "ProPack"
• fbcondor - framebuffer console decoration (gentoo kernel)
• airt - advanced incident response assistant tools - http://159.226.5.93/projects/airt.htm
• omnibook - HP laptop support http://www.sourceforge.net/projects/omnibook
• tpctl - thinkpad system control kernel modules http://tpctl.sourceforge.net
• usbirboy - homemade ir USB receiver http://usbirboy.sourceforge.net/
• parapin - parallel port pin kernel module http://parapin.sourceforge.net/
• legousb - lego mindstorms usb tower kernel driver http://legousb.sourceforge.net/
• sysprof - system-wide profiler http://www.daimi.au.dk/~sandmann/sysprof/
• svgalib - svga graphics on the console http://www.svgalib.org/
• line6usb - usb driver for line6 PODs and the Variax workbench http://www.tanzband-scream.at/line6/
• packetcommand - driver for the em84xx dvd disc access http://www.htpc-forum.de
• em8300 - RealMagic? Hollywood+/Creative DXR3 video decoder driver http://dxr3.sourceforge.net
• em84xx - em4xx based mpeg-decoder card driver http://sourceforge.net/projects/em84xx/
• fsam7400 - software killswitch for F-S Amilo laptops and compatibles http://zwobbl.homelinux.net
• pcfclock - driver for the parallel port radio clock sold by Conrad Electronic http://www-stud.ims.uni-stuttgart.de/~voegelas/pcf.html
• rlocate - locate implementation that is always up-to-date http://rlocate.sourceforge.net/