XDS__Taiga_SkyBlock_1.0.zip is a release file of the Minecraft map XDS; Taiga SkyBlock 1.0 {MC 1.5}, made for Minecraft 1.5.0. It was published on March 15, 2013 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the XDS; Taiga SkyBlock 1.0 {MC 1.5} map page.
How to install: Extract the .zip and move the world folder into .minecraft/saves; the map then appears in your Singleplayer list.