We are looking to license or buy a Juce-based sampler skeleton, not necessarily with a GUI, to build on.
The idea is to bundle a basic GM sample player with our composition software as a starting point for new users. While the QuickTime GM Synth (DLSMusicDevice AudioUnit) on the Mac is quite usable for this purpose, its counterpart on Windows (Microsoft Wavetable Synth) comes with a horrible latency, because it is not available as a VSTi.
If someone would be interested in bundling a feature-limited version or demo of their existing product with our software, that would also be an option.
Also PM me if you have a very basic skeleton only. It may be worth looking at.