on tiddlywiki.com there's the standard tiddlywiki deserializer tiddler which contains some deserializers, one for json, one for html, one for old-style-tiddlers (I guess tw classic?) and one for .tid files https://tiddlywiki.com/#%24%3A%2Fcore%2Fmodules%2Fdeserializers.js
then there's the evernote import plugin with a deserializer for evernote files with the application/enex+xml mimetype: https://tiddlywiki.com/#%24%3A%2Fplugins%2Ftiddlywiki%2Fevernote%2Fmodules%2Fenex-deserializer.js -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/0ed4726b-e23c-46e9-b921-691f2e31c791%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

