Pandoc preprocessor/wrapper to consume, display, merge and diff criticmarkup (i.e. track changes mode).

Written in python and intended for web scraping.

What's really nice is that is supports a lot of languages (english, french, spanish, russian, german, etc) without any need for switching in code.

Uses an .ics file (or a simulated file, through a HEREDOC, see solutions here ) to send it through curl as a data stream and thus bring it into Nextcloud.

Simple date-time parser, with nice unix-y philosophy.

Demo shows how it can be integrated into e.g. vim workflow for switching between different representations of dates,
and moving dates up, creating diaries with hundreds of entries, etc.

date-time parser for go. Similar to dateparse for python, just for Go - and I'm not sure if it supports as many natural formats, or languages.