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:
Afraid Of The Dark by David_M1A2 & Tagii
Steam Engines Mod by MeisterSkywalker alias SkyProgs & Mantes
Wonderful Wands by Cyanobacterium
Ruins Spawning System by AtomicStryker & homacs & d00dv4d3r & kolt666 & 4HeadTiger & Blue001 & jsmith & Saeldur
PneumaticCraft by MineMaarten
EvilCraft by rubensworks (aka kroeserr) & immortaleeb (aka EeB)
Greg's SG Craft by Greg Ewing
Ender IO by CrazyPants & tterrag
UnLogic II by The_Fireplace
IndustrialCraft 2 by Alblaka & Player & RichardG & Thunderdark & GregoriusT & alexthesax & Drashian & Elementalist & Feanturi & Lurch1985 & SirusKing & tahu44 & Aroma1997 & estebes & Chocohead
Reliquary by x3n0ph0b3 & TheMike & P3pp3rF1y
MrDimka's Extra Food by MrDimkas_Studio
Talismans 2 by Gigabit101 & Mj11jM
Soul Shards - The Old Ways by TehNut
NeoTech by Dyonovan
Alchemy Craft 2 by damagicgeek
Slime Dungeons by Wuppy29
Blood Magic: Alchemical Wizardry by WayofTime
Immersive Engineering by BluSunrize & Damien A.W. Hazard
Advanced Generators by bdew
Criss Cross by oitsjustjose
Elements of Power by gigaherz
GeoActivity by Decebaldecebal
Minecraft Comes Alive by WildBamaBoy & SheWolfDeadly
Jon's Useless Mod by Jon
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 (port by williewilus)
Extra Utilities 2 by RWTema
RFTools by McJty
RFTools Dimensions by McJty
VoxelMap by MamiyaOtaru
Minions by AtomicStryker
Biomes O' Plenty by Adubbz & Amnet & Cheeserolls & Forstride & ted80
Grimoire of Gaia 3 by Silentine
Base Metals by Cyanobacterium (aka DrCyano)
Modern Metals by cyb3rkat
Dense Ores by RWtema
Nether Metals by Knoxhack
End Ores by Rowan662
MAtmos by Hurricaaane (Ha3)
Sound Filters by Tmtravlr
Battletowers by AtomicStryker
Iron Chest by cpw
Chisels & Bits by AlgorithmX2
Waypoints by AUTOMATIC_MAIDEN & kamildanak
Backpacks! by Brad16840
QuantumStorage by Gigabit101
EZ Storage by zerofall
Storage Network by MrRiegel
Just Enough Items by mezz
Waila by ProfMobius
Whole Tree Axe by CubeX2
Custom Recipes by MightyPork & TheBoo & 61352151511
Better Foliage by octarine-noise & Meringue
Inventory Tweaks by Jimeo Wan & Kobata
Damage Indicators by rich1051414
SimpleChunkLoader by Gigabit101
SimpleGraves by TehNut
AuraCascade by pixlepix (1.8 port by williewillus)
Doomlike Dungeons by Jared Blackburn (JaredBGreat)
Baubles by Azanor
Fast Leaf Decay by Olafski
Charcoal Block by MinecraftDevin11
bdlib by bdew
Bookshelf by Dyonovan & pauljoda
Cyclops Core by rubensworks (aka kroeserr)
EnderCore by tterrag & CrazyPants
In-Game wiki Mod by MineMaarten
It's the little things by Zlepper
Liteloader by Mumfrey
McJtyLib by McJty
MCMultiPart by amadornes
Ore Dictionary Converter by EXTER
RadixCore by WildBamaBoy & SheWolfDeadly
RebornCore by modmuss50 & Gigabit101
AtomicStryker Update Check Mod by AtomicStryker
Version Checker by Dynious
Waila Harvestability by squeek
Better Bedrock Generation by Gigabit1011
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!