5. Last Days
Another post-apocalyptic world only more depressing. All hope is lost and all that's left are the ashy, and sometimes mutated, remains of the past. Started by the famous Doku and has been continued by fans.
4. The End is Extremely Nigh
Who doesn't love a good post-apocalyptic world? The pixel art is as lovely as abandoned your world feels. Maybe single player Minecraft isn't so bad after all?
3. High on Sugar
Sometimes, a cookie is enough sugar. Sometimes it's not and you want to go full-on diabetic. High on Sugar turns Minecraft into an adorably girly candy land. A wonderfully sweet work of art that also includes support for Random Mobs.
2. Broken Anachronism
The first of two steampunk themed texture packs. The level of detail is enjoyable and many of the blocks are animated. It gives you a interestingly scary steampunk atmosphere.
1. Glimmar's Steampunk
The best for last, Glimmar's Steampunk has a ridiculous amount of textures to customize the texture pack to your own needs. The level of detail blows the mind, it doesn't look it but it really is just 32×32 in size. I can't write enough to say how outstanding this texture pack is, so you'll have to see it for yourself.