Minecraft Beta 1.9-pre1 is one of the notable free download versions. It is the first of six pre-releases for 1.0.0, including changes and other additions.
About Minecraft Beta 1.9-pre1
Actually, Minecraft Beta 1.9-pre1 is an exciting free download version which was unofficially called the Lost Update. Beta 1.9 never came. Mojang decided to delay the release date until MineCon 2011. In Minecraft 1.0.0, jumping will upgrade your experience. Additionally, there are many additions related to biomes, items, structures, mobs, and blocks.