MCBobbejaanRS0505.zip is a release file of the Minecraft resource pack MCBobbejaan Resourcepack, made for Minecraft 1.7.4. It was published on May 4, 2014 and is 15 MB in size. For the full description, screenshots and every other version, visit the MCBobbejaan Resourcepack resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.