As raised here with someone looking to integrate chat in tiddlywiki, there are already a number of Intergrations documented in talk.tiddlywiki.com
I believe if we could collect and list as many Intergrations we can in tiddlywiki including to import or export from other tools/platforms, even competitors more users will be attracted to tiddlywiki in part because tiddlywiki.com will come up in searches for these other tools.