GExpert, adds several new features to the IDE: http://www.gexperts.org/
Delphi IDE Keyboard Shortcuts: http://delphi.about.com/od/adptips2005/qt/editorshortcuts.htm
Delphi online documentation: http://docs.codegear.com/
Delphi IDE / Tortoise SVN integration http://delphiaddinfortortoisesvn.tigris.org/
JEDI VCS: Delphi oriented open source VCS system: http://jedivcs.sourceforge.net/
Code documentation : Doxygen ( http://www.doxygen.nl/ ) + Pas2Dox filter( http://sourceforge.net/projects/pas2dox/ )
Trac, Project management, Issue tracking, Wiki, Subversion web UI: http://trac.edgewall.org/
Bitten, Continuous integration: http://bitten.edgewall.org/