Also not open source, DbVisualizer (http://www.dbvis.com http://www.dbvis.com) has been my primary SQL editor / query tool since moving off Windows as my deskto

Also not open source, DbVisualizer (http://www.dbvis.com http://www.dbvis.com) has been my primary SQL editor / query tool since moving off Windows as my desktop. There is a free version, but the paid version has some nice basic charting, and recently a decent explain plan visualizer. Many of the f/oss SQL tools are coming along, but lack some of the features that the Windows/BI world is accustomed to. Edit: Link spelling