Pull requests to expand this list are acceptable provided they are correct and include a link to the mod download. Any mods are welcome on this list, but mods in Feed The Beast packs are focused on. Mods are expected to be organized alphanumerically and have some indication of already completed work.
Do decoration and world gen blocks first when possible
Backpack http://www.minecraftforum.net/topic/1492661-15x-16x-backpacks-v-12629/ (Complete, needs restyling)
Chisel http://www.minecraftforum.net/topic/1749374-164smpforge-chisel/ (Minimal progress)
ExtraBees http://extrabees.accudio.com/ (Partial, most textures done)
ExtraTiC http://www.minecraftforum.net/topic/1985397-forge-extratic-tinkers-construct-metallurgy-add-on/ (Some progress, a lot of recoloring existing stuff)
ExtraTrees http://extratrees.accudio.com/ (Some progress)
Forestry http://forestry.sengir.net/wiki.new/doku.php (Needs some tree's, butterflies, some saplings)
JABBA http://www.minecraftforum.net/topic/2182366-16x-jabba-103-just-another-better-barrel-attempt/ (Not started)
Mekanism http://ci.indiewikis.com:8080/job/Mekanism/ (Need some armor models)
Metallurgy http://www.minecraftforum.net/topic/744918-164forgesmp-metallurgy-putting-the-mine-back-in-minecraft/ (Most blocks done)
Natura http://www.minecraftforum.net/topic/1753754-16xnatura/ (Need crops and some trees.)
OpenBlocks http://www.minecraftforum.net/topic/1941514-16x-openblocks-122/ (Lots of progress, a bit more to complete)
Power Converters http://www.minecraftforum.net/topic/1695968-164-samrg472s-mods-powerconverters-alpha-builds/ (Some progress)
Project Red http://ci.indiewikis.com:8080/job/Project%20Red/ (Some progress, lots more to complete)
Thermal Expansion http://teamcofh.com/ (Needs liquids, pyrotheum dust)
Tinkers Construct http://www.minecraftforum.net/topic/1659892-164tinkers-construct/ (Needs decoration blocks.)
A list of quick projects if you would like to make a small contribution. These are organized from most important to least.
Border Stone from Extra Utilities
Drum from Extra Utilities
Nether Berry Bushes from Natura
Heat Glass from Natura
Flesh from Biomes O' Plenty
Mossy Skystone from Biomes O' Plenty
Brownstone from Tinkers Construct
Mob Chunks from DartCraft
Furnaces/Macerators/Compressors from DartCraft
Plates from IC2
Seedbags from IC2