I've just checked WebAssessor and seen that I can register for the Salesforce Certified Force.com Developer - Winter '16 Release Exam. The description says that it's:
Successful completion of the Salesforce Certified Developer Winter '16 Release Exam is required for all Salesforce Certified Force.com Developers, Advanced Developers, and Technical Architects.
With a price tag of $100.
Is this a maintenance exam? I haven't had to pay before to maintain my credential (Dev-401). I'm confused here as to whether or not this is a maintence exam or something new for Salesforce? Do they charge $100 a year for being certified?
If it is a maintenence exam charging $100 for it is incredibly cheeky!