While I was studying for the Magento Developer Certification, I found that there were a lot of developer notes for it but they were fragmented across sites and blogs. Each article was great for topic depth but there was no single site that provided focussed and complete information that would be required for the exam.
Therefore, in preparation for the exam I took notes from other developers at Meanbee that had already earned their badge. Pairing these with me own notes I was then able to build and curate magecert.com.
Firstly, I hope that it's useful to others that are revising for the exam. Secondly, we would be most grateful to have submissions and corrections from other Magento community members. We're lucky to already have had Vinai Kopp give his seal of approval as well as a couple of corrections. Please find it on github.