Cull dead links and repos that are 404, updating where possible if a site has moved or if a repo is at a new location.
Also fixed up the GitHub repo links since by default all those links are on SSL.
Cull dead links and repos dusted to 404
Excised the apps, library and websites that no longer point
to a live site or repo.
Where possible, found the new homes of various repos moved.
By default all GitHub links are on SSL