Omar_s_Faithful_32x32.zip is a release file of the Minecraft resource pack Omar's Faithful 32x32, made for Minecraft 1.5.1. It was published on March 28, 2013 and is 2.5 MB in size. For the full description, screenshots and every other version, visit the Omar's Faithful 32x32 resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.