Scorched World by Cerulan
Adds a "Scorched" world type, which is completely free of natural resources and bounded by lava.
Brick-a-Brac by Saikou
A small mod that adds some decorative blocks to Minecraft. For now, just metal bricks, but there's more on the way soon!
Shulker Drops Two by Rick South
A minimalistic configurable mod that allows shulkers to drop two or more shells and ignore their default drop chance.