==Unscheduled / post-hoc / one-off relicensing==

This is probably properly outside the scope of this research, but people
often suggest things like these as examples when asked for projects whose
open source publication was "delayed".

* Netscape Navigator
* Blender
* StarOffice
* Qt

... and probably dozens, if not hundreds, of codebases that were released
after companies that were developing them shut down.

Maybe more ambiguous cases:

* Games from id software (routinely released/relicensed after the end of
  their main commercial viability, but not on a schedule and not with a
  public commitment to do so?)