Do note that most of my apps use the Stack Exchange API, and therefore you may be asked to authorize the app to access your Stack Exchange identity. This allows the app to determine your numeric user ID on the sites in the network where you have accounts. If you're curious what information is retrieved, you can take a look at the documentation. (It essentially boils down to the public information in your profile.)
If you wish to manage or revoke this access, you can do so from your profile on any Stack Exchange site. Click your name on any SE site (it's next to your reputation) and then click the "apps" link in the upper right. From this page you can revoke any access you've granted to any application, including these.
This is still a work in progress - I'm a coder more than a designer, so I apologize for the spartan layout and limited style :)