TypeItIn Pro
This is a very practical form filling program. Right click on a button to pop up the Button Menu. From here you can create new buttons, edit existing ones, or delete buttons. You can also change the button font and the button width.

In the professional version you can also copy or move a button to another group. The tray popup menu gives you access to the help file and the TypeItIn web site. In the professional version you can use the group options menu to create, edit, and delete groups. You can also password protect groups that contain sensitive information like logins or credit card numbers.