Nice collection.
Minor corrections:
- The last ModPlug Tracker release was, if the file date is any indication, in 2003, not 1999. It does not have any specific processor requirements, it definitely does not require a Pentium II. It should even run on a 486. It supports both PCM samples and VST (although just very basic support)
- OpenMPT has been last updated in 2017 and while "OPEN SOURCE VOLUNTEERS" as authors is technically correct, it has been manx and me who have been maintaining it for the last few years. The system requirements are Windows XP and a Pentium or better CPU (SSE is not required), Windows 9x support has been dropped.