Steven Black announces the Open Source release of the INTL toolkit:
https://doughennig.blogspot.com/2019/10/intl-is-now-open-source.html
And, inspired by Steve's decision, Doug Hennig has released SDT, the Stonefield Database Toolkit:
https://github.com/DougHennig/StonefieldDatabaseToolkit
These are both great tools I've used in past projects, and I recommend them!