Portable, royalty-free, and includes complete source code. In addition to classic character-based applications, Max also supports Web systems. NetSQL is a light and robust SQL database server for Linux and Sun Solaris. Because it can be configured on a virtual web server, it enables every Webmaster with a virtual web site to host database applications.
Commercial version is also available.
ObjecTrieve allows a developer to build robust database management applications that allow direct and fast access to records. As it is available under multiple platforms, a developer can build applications that can easily be ported across different environments.