VSTunnel

This was one of the best collab tools, it worked in any DAW as a VST plugin/insert, we have made many tracks with friends many years ago even using the simple demo version available it is a shame plugins and developers like this go unnoticed and their plugin abandoned, the closest thing i can think of nowadays to this app is Ohm Studio, but even still this VST plugin was the best collab tool.

Try Jamtaba.