Realistic Terrain Generation by WhichOnesPink
Adds a new world type which generates realistic terrain.
Forgotten Relics by Integral
...or Grand Theft Texture VII. You face an addon to Thaumcraft 4 and Botania, that adds tools and accesories, generally oriented on expansion of mid- and end-game content, offering you weapons of unmatched power. It all mostly goes to Thaumcraft side, but some relics are supposed to be a logical inheritors of Botania's things. There's also a variety of stuff inspired by and based on Terraria and Terraria's mods, especially Calamity and Thorium.
Epic Armor! by Dereliktt
This mod brings new sets of armor with custom models to Minecraft because generic armor is boring.
Colors by A Deathly Touch
Colors adds 16 differently colored blocks, a pretty Rainbow block, and an Enderpearl that goes farther! And all blocks light up when given a Redstone Signal! (Configurable)