Event Sign Up
I have found two great ways to help with sign ups and they are free!. The first is Sign Up Genius. This is great for sign ups for volunteers. You can select what you need and have people sign up for food, transportation, help, or skills.
Event Bright is another great website for sign up for events and you can even have the option to let people pay online. I am using this for simple sign ups. These are two great ways to bless your ministry.