Zephyr Basecamp is a functioning GTK frontend and PostgreSQL backend enterprise project that gives small and midsize businesses the same level of inventory, order entry, sales tracking, and accounting functionality as would be expected from commercial applications. It has interfaces for both X11/GNOME/Linux and Windows.
liblookdb is a C++ library that provides an interface to several common Database Management Systems. It enables the programmer to write application code that can be built and run unchanged on a variety of platforms and against several DBMSs. It is currently in use in production code on Win32, GNU/Linux, and Compaq Tru64 UNIX, and against Ingres II (and older versions), Oracle 8i, PostgreSQL, and ODBC (on Win32 only at present). An application can choose which DBMS interface layer to load at runtime.
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.
ocicpplib is a C++ library to communicate with Oracle RDBMS through OCI. It features a JDBC-like interface to Oracle. The goal of the OCI C++ Library is to provide a simple interface to Oracle. It features support for Oracle 8 and 8i, BLOB/CLOB support, ROWID, REFCursor's and Nested Tables.
RADpage is a rapid application development system for dynamic, data-driven Web applications. It directly operates inside the browser without requiring a client-dependent development environment. RADpage comes as an Apache module or a CGI, includes a powerful HTML/XML like object-oriented programming language called heitml (pronounced "Hi-TML"), and more than 150 Web application components. Development is done on a fully functional application instead of requiring the edit-save-browse cycle associated with conventional client-side development environments. The RADpage editor stores application pages in readable well-formed XML or upon request in HTML for editing with HTML editors.
Data Architect is a database modelling tool capable of building ERD diagrams, reverse engineering of existing databases, and creation and modification of databases. It includes a powerful SQL editor and support for various database backends through ODBC. It is available both on Windows and Linux.
C Scripting Language (CSL) is an embeddable scripting language with C syntax. A comprehensive set of libraries is included in the base package, and writing your own libraries is possible with an easy API for C programs, as well as a class interface for C++ programs. If you are looking for a compact and powerful scripting engine for your application, CSL might be the choice.