pocket (formerly wallet) is an excellent password app that you can store passwords, credit card/bank numbers, insurance, etc. with user defined categories also. As far as the desktop management I'm not sure what you mean. You would doubtfully find an app that handles storing passwords and another function. If you are wanting to control your desktop remotely then try "log me in" there is a server that runs on your PC, an app for your phone, and a web interface all of which allow you to remotely access the PC running the server.