All mods included do not require official permission to distribute, though many required us to take specific action, such as posting to a forum, including links or giving credit where credit is due. To not give preferential treatment to those mods that are the most sticklerish, here's a complete list of mods, authors and links:
Roguelike Dungeons by Greymerk
Random Things by Lumien
BuildCraft by SpaceToad & BuildCraft Team
Thaumcraft by Azanor
ComputerCraft by Daniel Ratcliffe & Aaron Mills
Botania by Vazkii
Extra Utilities 2 by RWTema
Sound Filters by Tmtravlr
Iron Chest by cpw
Backpacks! by Brad16840
Just Enough Items by mezz
Better Foliage by octarine-noise & Meringue
Inventory Tweaks by Jimeo Wan & Kobata
Baubles by Azanor
Treecapitator by bspkrs and DaftPVF
Project: Red, Forge relocation, Forge Relocation FMP Plugin by Mr_TJP
MrTJPCore by Mr_TJP
Agricraft by InfinityRaider
Chisel 2 Originally by Automatic_Maiden now Pokefenn
CoFHCore, CoFHWorld, Thermal Foundation, Nether Foundation, Redstone Flux by TeamCoFH
Dimensional Doors by CannibalVox.
Forestry by SirSengir
Mystcraft by XCompWiz.
Mantle and Tinkers' Construct by MDiyo
Mekanism by aidancbrady
ModTweaker by Jaredlll08
ObsidiPlates by Myrathi
OpenBlocks, OpenModsLib by OpenMods
Twilight Forest by Benimatic
Abyssalcraft by Shinoow
Actually Additions by Ellpeck
Advanced Rocketry by zmaster587
Astral Sorcery by HellFirePvP
Aether Legacy by 115kino
Wizardry Mod by Demoniaque
Magneticraft by cout970
Rustic by Voxel_friend
Dynamic Surroundings by OreCruncher
Applied Energistics 2 by AlgorithmX2
Animania by Purplicious_Cow
BC eXtra Pipes by Face_Of_Cat
Chicken Chunks 1.8+ / CodeChickenLib / ChickenASM by covers1624 and Chicken-Bones
CraftStudio API by ZeAmateis
CraftTweaker by jaredlll08
Extreme Reactors / ZeroCore by ZeroNoRyouki
Farseek by delvr
HWYLA by TehNut
Portal Gun by iChun
Industrial Foregoing by Buuz135
Integration Foregoing by Jackyy
JAOPCA by TheLMiffy1111
Just a Few Fish by Tmtravlr
Just Enough Dimensions by masa
librarianlib by yrsegal
LibVulpes by zmaster587
modelloader by cout970
Ore Shrubsby Lhykos
plustic by Landmaster_phuong0429
signedit by ToroCraft
Streams by delvr
Tinkers' Complement by KnightMiner
Waila Harvestability by squeek502
Ruins by AtomicStryker
OreLib by OreCruncher
MapWriter 2 by VectronDiablon
bspkrs-Core by bspkrs
absentbydesign by Lothrazar
BetterFPS by Guichaguri
Ceramics by KnightMiner
Chunk Animator by Lumien231
compressed_stones / missingnetherores by ghohenzollern
ConnectedTexturesMod by tterrag1098
Ender Storage by covers1624
energyconverters by xalcon
Erebus by vadis365
FastFurnace / FastWorkbench / Toast Control by Shadows_of_Fire
foamfix by asiekierka
Forgelin by Shadowfacts
infinitylib by InfinityRaider
JEIBees by bdew
LandCraft / LandCore by landmaster_phuong0429
MTLib by Jaredlll08
Natura by mDiyo
noRecipeBook by Seneschal_Luwin
NuclearCraft by tomdodd4598
Placebo by Shadows_of_Fire
Surge by Darkhax
teslacorelib by face_of_cat
VanillaFix by Runemoro
WrapUp by thelmiffy1111
Ruins Structures authored by:
Arrrg & AtomicStryker & BlinkyZero & croweshand8 & d00dv4d3r & Gantz & Gilly & GnomeWorks & Genshou & Jeheace & Jordan_Greywolf & ksheep & Malgor & Mosslander & Mozai & RoofFiddler & thecraww & Kujaku10 & WildBluntHickok
Please thank and support these folks as best you can!