Coolhacks is a fun and amazing work where you can find awesome and cool collection of hacks on almost anything.It is completely open source in nature. MIT Licensed work.
Some cool hacks on Docker
Some cool hacks on Python
Some cool hacks on Kubernetes
Find new and subtle Golang Hacks
Some Cool Hacks on Jenkins which is originally inspired by Hudson.
Some cool & awesome hacks on Internet of Things
Some awesome collection of raspberry pi hacks
Some awesome and cool hacks on vagrant.