Have you tried Firebird Development Studio ? Debugging is already here, navigation is possible using Ctrl+click and Database Designer module has it's own version control.

Best regards,
Pavel Kutakov
www.sqlly.com

--- In firebird-tools@yahoogroups.com, "robert.gilland" <robert.gilland@...> wrote:
>
> Is there a PSQL editing tool for firebird, that has the following:
>
> - version control compatibility with subversion.
> - debugging.
> - navigation between nested stored procedures.
>
> Tried Database workbench but has no version control.
> Tried Power Designer but has no debugging.
>
> Kind Regards,
>
> Robert.
>