Developer Art Classic is a texture pack that seeks to recreate the textures of the beta versions of the game. It retains the classic look of the textures, while adapting them to the new versions. The classic menus, clouds, interface and of course the block textures will give you an incredible feeling of nostalgia and bring back that unique style of old Minecraft.

Screenshots of Developer Art Classic texture

How to install the Minecraft texture

Install Optifine HD (Optional but recommended)
Copy the resource pack to your .minecraft\resourcepacks folder.
Choose your desired resource pack in the game settings