I am a co-admin of https://sourceforge.net/projects/collada-dom/ working on COLLADA-DOM from 2016 forward. I am in the process of deemphasizing the 2.4 and older versions of the COLLADA-DOM, and promoting the decade apart version 2.5 enhancements to the package; which I am solely responsible for.
Here is an entry point to my personal work. Mark Barnes of COLLADA fame is a backer of this Patreon account, supporting my work (including work pertaining to COLLADA.) Won't you join him?