I use Collections as the former Garage application on my community and with Michael no longer present for a little while, I have already forked his copy of version 4 due to bugs and other features I needed. With him not going to upgrade it for version 5, I have rewritten it for my own use. I plan to likely make this available in the near future as I finish up testing. I have a converter built to convert Collections to my Garage app as well.
You can contact me if you would like to be an early adopter.