There's
MinimapButtonBag but it hasn't been updated on this site for quite some time. It currently sees updates on
http://files.wowace.com
Alternatively, you can use
Minimap Button Frame or
Detached Minimap Buttons.
If you don't use
FuBar, some of your minimap buttons may actually be FuBar plugins. (I don't know what mods you have.) Also, take a look through your minimap buttons. Are there any that you don't need access to all of the time (can you hide them)? Are there other methods of getting to config options (like slash commands)?