The new feature in version 3 is the generation of Data Matrix 2D codes, like this:
Ada Bar Codes can be found via the following links:
Home page: http://ada-bar-codes.sf.net/
Project page: Ada Bar Codes download | SourceForge.net
Mirror: GitHub - zertovitch/ada-bar-codes: Ada Bar Codes: bar code (1D and 2D) generator in pure Ada
Alire crate: Alire - Bar_codes
Enjoy!