Remembering passwords is a delicate thing. The more places you are logged in the more passwords you need to remember. Some people like to use same password in more than one place which is not very recommended, because finding it out in one place will open all doors. Anyway this is not a question for now. Lets say you need to log in to one place over and over again. This may start to be annoying. Luca offers a solution called type4me. It is a small PIC18F14k50 based board that is recognized as HID keyboard. Single button press and it types a password in a cursor location.
Additionally it is recognized as CDC device that creates virtual serial port. It can be used to program various commands in microcontroller and change password sequence if needed. Project files are available at git.