pgAdmin is the leading graphical Open Source management, development and administration tool for PostgreSQL, running on Windows, Linux, Solaris,

Krumo is a debugging tool for PHP that is intended to replace print_r() and var_dump(), which display structured information about any PHP variable. It does the same job but presents the information beautified using CSS and DHTML.

The Xdebug PHP extension aids script debugging by providing a lot of valuable information, including stack and function traces in error messages, memory allocation traces, and protection from infinite recursions. Xdebug also has a built-in debugging server which you can access with a debug client to debug your scripts remotely.

DBClient is a new Open Source Tool for connecting to jdbc compliant relational databases. DBClient is massively based on Plugin architecture.

A systematic approach for developing a certain type of software applications, typically including support programs and code libraries. Framework is a wide category of software, representing everything from web frameworks like the popular Ruby on Rails to testing frameworks like the Simple Test framework for PHP.

Mapstraction is a javascript library which abstracts away the differences between online maps from major players (i.e. Google Maps API, YahooMaps API, MultiMap, Map24, OpenStreetMap etc) and frees up developers from changes to terms and conditions, degradations in performance, addition of ads, etc. The hope of the project is to allow people to switch seamlessly to free and open data from OpenStreetMap.