Here is the list of certification courses I have taken:
The Complete Python: Beginner to Advanced! – Joseph Delgadillo
JavaScript Programming Complete – Jazeb Akram
The Complete Web Developer Masterclass: Beginner To Advanced – Joe Parys
Learn By Example: Scala – Loonycorn
How to Make a Freaking iPhone App – iOS 10 and Swift 3 – Nick Walter
Professional Rails Code Along – Jordan Hudgens
Git Complete Mastery with GitHub : 100% Hands-on Git Guide – Bibhash Roy
Learn Angular 2 from Beginner to Advanced – Ermin Kreponic
Projects in Programming Languages – Ruby, Python, Java – Mashrur Hossain