Wizer.me. I decided to investigate and see if it worked for me and my students. I would have to say, it is easy to use and meets my expectations.
I found the format of the site very similar to Smore, which is a newsletter creation site. This site was set up very similar to Smore, just as easy to use. I noticed there is an autograde option as well. I love that. If you are doing a multiple choice, matching or true false test, you can select this option and it will auto grade for you as soon as the kids are done with the assignment. What a time saver! That alone makes it worth it for me.
The program does offer several tutorials to explain how to use it. I found it very simple. You can embed the worksheet into your LMS and the kids can do everything right there, directly in the LMS and not on an external site. I love that capability. When the kids go there the first time, they do have to link their account to their gmail, or make a personal account. We are a google school so they linked via Google+ and it took them right to the worksheet.
I think this is a very easy site to use and once a worksheet is made, it can save a lot of time later.