CautiousRenewal is a Minecraft texturepack for Beta 1.7.3 which aims to carefully and conservatively improve Minecraft's appearance without making it feel like you're using a texturepack, mainly by intoducing hue shifting, decreasing noise and limiting palettes. Aside from using it in a game directly, you can employ CR as a base for your own texture pack over vanilla textures.
> Download
Or go to the "Releases" section and grab the latest one.
Modifications I did are licensed under CC BY, but since all the resprites are heavily based on Minecraft’s original textures I should be clear that those belong to Mojang with their respective licensies.