
ElvenTools by reginn
util opensource survival

Emasher Resource by Emasher
opensource library worldgen

Ender Prospecting by Blir, Talkarcabbage
Craft Eyes of Prospecting and use them to track ores!
opensource

Ender Utilities by masa
Some random, hopefully fun, and possibly even useful utilities (Modjam 4)
opensource modjam teleport random tech

EnderNet by asie
opensource addon tech

Enderium Power Armor by tterrag
opensource armor tech

Engineer's Toolbox
Engineer's Toolbox is a tech mod with a focus on customization. It's based around blocks called sockets which can have modules installed on their sides to serve various functions. Different modules can do everything from simple redstone logic, to generating energy
opensource tech

Equivalent Exchange 3 by pahimar, x3n0ph0b3
Transmute stuff into other stuff! Become a Minecraft God!
opensource

FMPIntegration by wasliebob
This mod adds microparts for all blocks ingame
cosmetic opensource addon

FloatingRuins by DaftPVF, bspkrs
Floating islands taken from the ground with ruins on top.
worldgen ruins dungeons serverside opensource

Forbidden Magic by SpitefulFox
Forbidden Magic is an addon to add many dark-themed things to Thaumcraft.
magic opensource enchanting

Forge Mod Loader by cpw, LexManos
The Forge Mod Loader provides the ability for systems to load mods from the file system. It also provides key capabilities for mods to be able to cooperate and provide a good modding environment. The mod loading system is compatible with ModLoader, all your ModLoader mods should work.
library opensource

GraveStone by NightKosh
This mod adds a gravestone to the game, which 'spawns' at player/villager/dog/cat death.
opensource worldgen dungeons

Harken
Adds voice control for Minecraft - mainly for accessibility, but fun things happen if glasses are worn.
opensource accessibility

HarvestCraft Waila Fixes by squeek
An add-on for Pam's HarvestCraft that fixes a few missing names/icons in Waila tooltips
opensource survival addon

In-Game Mod List (1.6)
This mod provides an in-game interface for the mod list hosted over at modlist.mcf.li.
opensource util

In-Game Mod List (1.7)
This mod provides an in-game interface for the mod list hosted over at modlist.mcf.li.
opensource util