Minecraft .jar Juggler?
 

Are there any good tools for automating the switching of minecraft versions you're running. Say you want to try a pre-release for example. Is there a tool that will track various minecraft version's you've got and do the appropriate moving/renaming of files so you don't have to do this manually?

A better search of our own forum plus some googling turned up several options. Minecraft Profile Manager appears to be one of the more popular ones. Anyone have experience using it?

Minecraft Profile Manager - Minecraft Forum

I use Magic Launcher.

For me it had more settings and performance tweaks I could do, but like profile manager you can also set up multiple versions/profiles with differnt jars and it makes mod installation too easy.

I know a few, me included that made the switch from profile manager..
Both programs should do what you want and more, have a play and see what you like.

[Launcher] Magic Launcher 0.9.8 (mods, options, news) - Minecraft Forum