Hi,
as a small enhancement request, would it be possible to access the shell context menu for any loaded files?
Many source control systems add their commands to the shell menu, so it would be possible to check-out and check-in files from within PL/SQL-Developer without the need for a specialized plugin.
Since PL/SQL-Developer is written in Delphi you may know the CnWizards Extension to the Delphi IDE. That extension offers this functionality, and through the shell context menu I can access our Team Foundation Server to check-out and check-in the file in the editor.