LiveCode Forums.

for being an open source project, neither of the websites have a link to the source code download repo..

See http://livecode.com/community/contribute-to-livecode/

This page has links to the source code as well as some links to git.

Repo is here: https://github.com/RunRev/LiveCode

Would be nice to have a link to the repo on the Downloads page instead of being buried on that tl;dr page