DbVisualizer

View JDBC databases graphically

A fully rounded development platform for Android that includes an editor, emulator, and code templates

An open source version of one of the most popular integrated development environments for Python

An administrative tool that makes it easier to manage the databases that make up a website

A text editor for developers that sports a trimmed down interface and a decent amount of features

A robust integrated development environment for Python that's notable for being feature rich and catered to the needs of Python developers