min5craft is a texture pack for Minecraft that I worked on ages ago in a hidden and subjectively dark corner of the internet. Its main goal was to increase distinguishability of blocks and overall provide a cartoony and rigid feel. It uses a couple of textures from Umbre’s Aperture Enrichment resource pack.
Note that this texture pack is designed for version 1.5.2 of Minecraft, and using it in later versions will destroy the pack’s integrity, since the addition of different types of stone and extra mobs into Minecraft. However, min5craft is open source, so you may freely add to and distribute updated versions of the pack.