MoarSlotz_1.3.zip is a release file of the Minecraft mod MoarSlotz. It was published on May 15, 2013 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the MoarSlotz mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.