In addition to DA, IDQL, and IAPI I have used Samson (packaged with Documentum), Delilah, and dqMan as tools for Documentum development and troubleshooting. I really like dqMan and have been using it for a few months now. I even thought of writing a review for it but never got to doing that.
When I saw a post on the Yahoo user group today, I was thinking, “yet another …”. However, it must say something if I started writing this post as soon as I did a cursory interaction with the tool. It’s really handy for analysis as it lets you click and right-click through the results progressively to get to what you are looking for. It also readily helps you look up reference-like information (for example, visual representation of type hierarchy). The ability to test XDQL and generate scripts were things which I didn’t expect at all in this tool!
There is a lot more to this tool (named after the author) – SivDM-Document Manager. Give it a try and I am confident that you will find something in it that you would want to use. Siva, thanks for sharing this with the community.