Because I am a programmer by training, if something is annoying I like to make the computer do it for me. All those experiments are provided as-is, with no guarantee that they're bug-free, full-featured or going to be maintained. If you find them useful, consider tipping on Ko-Fi or supporting me on Patreon.
Unless specified otherwise, all those programs are licenced under the EUPL 1.2. That means you can copy, modify and use the source code in your own projects, but they'll have to keep any existing credits and be released under an open licence. You can read the official guidelines here, and the full licence text here. A local copy is available here.