I’ve been working on this little database browser in my spare time for almost 3 years now…
The idea is to have a light-weight interface where you can quickly search for and query data without having to use SQL for most things. Because it’s a web app (unlike most tools in this category), you can use it to access databases remotely without installing any client software.
It can also be embedded into another web app to provide simple administrator functionality for those times where you just have to drop into the database to fix a problem or to run some quick reports or view some data. You can impose additional access rights to the database (such as which tables are visible, simple CRUD flags, etc.) to expose a smaller view of the database as well.
I’ve been excited about this project for a long time, but always hampered by not having enough time to work on it. I don’t have a publicly available download yet, but hopefully that will be coming soon. Check out the basic features and screencasts at http://dbframe.com