Zan’s Minimap (also known as VoxelMap) is a modification for Minecraft 1.8.3, 1.8 and 1.7.10 that adds a fully functional minimap (like the ones in WoW, Guildwars) on the right corner of your screen.
Marglyph’s TooManyItems (TMI) for Minecraft 1.8.3, 1.8 and 1.7.10 is a must-have modification which allows player to gain any in-game item right inside your inventory by using your resources in backpack.
Minecraft Forge (API) for Minecraft 1.8.3, 1.7.10 and 1.6.4 is an open-source tool or a modification layer which provides modding capabilities to developers and players.
OptiFine HD for Minecraft 1.8.1 is a performance enhancement modification which doubles the FPS (frames per second) rate inside your world.
Not Enough Items is a modification for Minecraft 1.8/1.7.10 that enables a better inventory management system for your Minecraft items.
GLSL Shaders is a modification for Minecraft 1.8/1.7.10/1.6.4 that brings OpenGL based Shader graphics in your Minecraft world and make it look fabulous.
XRay Mod (with fly) is a modification for Minecraft 1.8.1/1.7.10 which enables X-Ray vision in your world seed. It enhances your mining experience by a great margin and allows you to find desired blocks easily with less effort.
Rei’s Minimap Mod for Minecraft 1.7.10 is one of the useful modification which enhances your gaming experience. Rei’s Minimap Mod adds a highly customizable mini-map like in those MMO games (GuildWars, LoL etc).
Pixelmon for Minecraft 1.7.10/1.7.2 is a modification for Minecraft inspired from a Anime series ‘Pokemon’.
Forge ModLoader is a modification that provides extensive modding capabilities in Minecraft 1.7.2.