A relational database management system, based on the principles laid down in the book "Databases, Types, and The Relational Model: The Third Manifesto" by C. J. Date and Hugh Darwen.
2tools is a set of online CMS maintenance tools: just one click to migrate to/from different CMS; safe configuration settings to upgrade your CMS; easy Data movement to/from DBMS, databases or tables; SQL, XML, XSLT, PHP technologies.
All tools are main
CAVOR is an engine for building apps that involve both graphic and text/numeric data. Primarily GIS is the initial focus, but consider also CAD, CASE, project management (eg PERT charts), and others. Built-in scripting, C API, also supports Tcl and Java.