Today, I got the Scrum Fundamentals Certification (SFC) by SCRUMstudy. It is a good exam that tests your basic knowledge of the SCRUM framework. There is also a course that you can take before applying for the exam and a free book. I noticed that some points are a little different from what the Official Scrum Guide teaches, but in general, it is still the same framework. I really recommend taking this exam.
You can check my credential here or over the SCRUMstudy website http://www.scrumstudy.com/Certification/certification-registry.