FlagShip is a database development and porting system for porting all applications based on the xBase language to UNIX. Completely source and file compatible to Clipper 5.2 (and previous versions) including macros, code blocks, objects, etc. The motto is "the same sources and data for both DOS and UNIX". (quote)
You will find the documentation under /usr/doc/packages/flagship.
To install, change to the directory /usr/lib/FlagShip and start the program FSinstCD. After installation the directory /usr/lib/FlagShip can be deleted.
The full version is also included, you only need to order a key from S.u.S.E.