TDbf is an open source library to access Dbase tables. It’s released under the LGPL license (which makes in impractical for most commercial Delphi development). It is also used in Lazaraus (I haven’t checked the license there, but apparently you can develop commercial programs with it.)
The project seems to be rather dead though. Apparently nobody noticed that it failed to compile with many Delphi versions, starting with Delphi 2009 and also including Delphi 10.2.
Today I wanted to simply add packages to support Delphi 10.3 and ran into these compile errors. I fixed them and also committed the packages. Be warned though, that I have not tested the functionality. It compiles but may still be broken.
Discussion about this post in the international Delphi Praxis forum.