Harbour is a free, cross-platform compiler for the Xbase language. It is designed to be as compatible with CA-Clipper as humanly possible. Harbour ships with full source and makefiles, and combined with one of many C compilers will create executables which run natively on the following platforms: Linux, FreeBSD, DOS, Windows 3.x/9x/NT/W2000, and OS/2.
FlagShip is a database development and porting system for moving xBase-based languages to Unix. It is a highly-optimized 4GL language, syntactically compatible to other xBase dialects like dBase, Clipper, Fox, etc. It is object oriented, but you don't need any OOP knowledge to use it. It supports the same code for DOS and Unix. It allows you to add C sources externally or inline in the program source, but does not require any C knowledge.
The c-tree Plus embedded database engine offers developers several APIs that provide low-level routines, ISAM-level control, and higher-level interfaces. c-tree Plus is distributed in complete C source, has been ported to 100+ environments and includes a robust database Server SDK. It can be used to develop single user and peer-to-peer applications, or the client-side for applications using FairCom's database server, the c-tree Server.
The c-tree Server is FairCom's multi-threaded, low-maintenance database server. It supports heterogeneous networks and lets dissimilar clients attach concurrently to any single or combination of c-tree Servers. Portability is afforded through over 30 supported platforms and 5+ supported communication protocols. c-tree Servers are easy to set up and require no system tuning or DBA. Additionally, FairCom offers a Server Side Development System, allowing developers to build their own application-specific database server.
ObjectDB for Java/JDO is a powerful yet compact Java Data Objects (JDO) Object Database (ODBMS), written entirely in Java, and compliant with the Java Data Objects (JDO) standard developed by Sun (JSR12). ObjectDB for Java/JDO is designed to efficiently handle databases of various sizes, ranging from a few KBs to hundreds of GBs. Among its features are small footprint, high performance, rapid development, easy deployment, and flexible architecture (1-Tier, 2-Tier, or N-Tier).
Pervasive.SQL is a high performance, low-TCO database server designed to be easily embedded in applications and devices targeted for Linux, Novell, and Windows environments. Pervasive delivers both transactional and relational access methods to the application in a single box. Based on this unique model, the developer can use the data access model most appropriate for a given task. This means high-transaction volume applications can exploit the performance-optimized transactional access method while reporting, statistical and other complex query tasks are easily addressed through the relational access method.