WP Migrate DB

By deliciousbrains.com, with this plugin you can migrate your database from one WordPress installation to another in just a click, depending on how large your database is it will take longer or not to generate the database dump, but all in all it’s really quick, and definitely this is one of those plugins that I can’t live without.

I highly recommend it, it works beautifully! You can download it for free on the wordpress.org repository. It also has a premium version, which I have never tested as I really haven’t had  the necessity yet to purchase it, but checkout the futures on their webpage.

Stream

Tracks logged-in user activity

Really usefull plugin to track any activity, for example a client’s site breaks, you can check the stream log to see what if there has been any new plugin installed, by who, etc and it makes it easier to identify the problem.

http://wordpress.org/plugins/stream/