Sorry, but your wording is unclear: what is wrong with ReWire, virtual MIDI, physical MIDI, or Ableton Link?
Is that an area that cannot be covered by such a project for example?
Depending on the OS, there should be many others that are similar.
ReWire is not supported and cannot be used on my Arch Linux, but I can use JACK and Ableton Link, which I am generally happy with.
Sorry, but it is unclear. What DAW do you want to synchronize with?
Synchronization of song positions? If so, would you not allow Loop on Renoise?
What is it that you want to do?
Have you done a search against the Renoise forum, that DAW’s forum, or Google,etc?