Default_.zip is a release file of the Minecraft resource pack Default+, made for Minecraft 1.5.2. It was published on June 1, 2013 and is 0.4 MB in size. For the full description, screenshots and every other version, visit the Default+ resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.
