Many thanks to Mojang for an incredible game, the Technic Pack folks for providing an incredible platform for pack-making and organization, and the developers of so many awesome mods. With the change to MC 1.7.10 I'm no longer listing every mod with links to them (they're all on CurseForge now); here are some of the mods in the pack currently:
Ars Magica 2, by Mithion
Alternate Terrain Generation, by TTFTCUTS
Backpacks, by Eydamos
Bibliocraft, by Joseph “Nuchaz” Sinclair
Biomes O' Plenty, by Adubbz and Forstride
Carpenter's Blocks, by Mineshopper
Not Enough Items (NEI), by Chickenbones
Custom NPCs, by Noppes
Damage Indicators, by rich1051414
Enchanting Plus, by Qizzok, xkyouchoux, mssodin28, & GnRSlash
HarvestCraft, by Pam
JourneyMap
Mine & Blade Battlegear 2
Natura, by mDiyo
Obsidiplates, by Myrathi
OptiFine, by sp614x
Ropes+, by AtomicStryker
Smart Moving, by Divisor
Tinkers' Construct, by mDiyo and Boni
Thaumcraft 4, by Azanor
TreeCapitator, by DaftPVF and Bspkr
Waila, by ProfMobius