Harbour is 100% Clipper-compatible and supports many language syntax extensions
including greatly extended run-time libraries such as OLE, Blat, OpenSSL, FreeImage,
GD, TIP, Tpathy, PCRE, HbZip (zlib and bzip2), cURL, Cairo, its own implementation of
CTools and NanFor libraries and many others. Harbour has an active development
community and extensive third party support.
Harbour includes various extensions of Clipper language; such as class creation,
support for date constants, FOR EACH and SWITCH structures, many extensions to
RDD and language features and much more.