What is the best, free, subversion control repository that can be used with the Eclipse subversion plugin?

There are tons of places that offer free repositories. Here are few:

• https://www.assembla.com/subversion/
• http://www.projectlocker.com/
• http://riouxsvn.com/
• http://beanstalkapp.com/

I would definitely recommend Assembla. The first time I used it I was in a similar situation as you. Didn't know what to choose, overwhelmed by all the choices. I went with Assembla and having used Assembla extensively since, I'm quite sure it will satisfy your needs. Has great features for team working also, and being robust, free and easy to manage it's worth a try.