Dynamic Surroundings Unofficial by Abastro, OreCruncher
Improving Minecraft's sight and sound experience
Slurp by EPIIC_THUNDERCAT, Cjm721
Addon to Tough As Nails, allows you to right click water to get thirst!
Lost Thaumaturgy by APengu
This mod adds a lot of content from Thaumcraft 2 and adds plenty of neat and useful magical tools that you may need to use while playing.