If you're joggling lots of accounts to test software or for other reasons and think the existing Password Management software is too complex, try out this super-simple apple script!
Use for instance Spark (http://www.shadowlab.org/Software/spark) to bind a keyboard shortcut to execute the account manager.
To save account information (including passwords) in an applescript is a bad security practice! This little tool is only meant to be used for unimportant accounts such as testing accounts used in test environments when developing software.