RoboForm Companion is a Roboform add-on for registering in contests. In other words, if you have RoboForm installed in your system, RoboForm can use your stored identities to register you in online contests. Roboform is a password manager that allows you to save your information into an "identity". You can then fill out various forms with one click, loading your personal data.
RoboForm Companion uses one of your identities so that joining contests becomes a lot easier. You can even edit your identities from within the application.
You will notice that the program has a built-in browser. You can use it to go to the URLs of the contests that you want to join and add them to the list of forms. When you do that, you can configure the application to fill out the form for you on a daily, weekly, or monthly basis. If the contest web site has an expiration date, RoboForm Companion will be able to tell you when contests have expired. You can then tell the application to delete all expired contests.
Unfortunately, RoboForm Companion does not list contests for you. You have to do that on your own. However, adding them is pretty simple. You would really take advantage of this tool if you are registering for several contests, and use batch registration. If you are not, RoboForm alone will most likely do.