https://www.timroes.de/2015/12/02/writing-kibana-4-plugins-basics/
Bonus track - creating traffic light visualization - http://logz.io/blog/kibana-visualizations/
Thoughtsworks radar - every few months Thoughtsworks publish their technology rating. There are 4 ratings - adopt, trail, asses and hold. The products / tools / methodology are divided to 4 groups - techinques, tools, platforms and languages and frameworks. It is specially interesting to see how ranks change over time. I found database products to be a little under represented. I guess there is also a bit of bias towards tools and companies they work with but nonetheless it is a interesting read.
https://www.thoughtworks.com/radar
. files - dot files are a common way to set all kind of configurations from .gitignore to .bashrc and everything in the middle. You probably have your configuration that you like and copy it from project to project. You still might find this repository helpful as it collects common configuration settings -
https://github.com/holman/dotfiles
Bonus track - git ignore by programming language
https://github.com/github/gitignore
SQL tabs - simple but get the job done. Yet another visualization tool above postgresql. Super simple installation and start up (on mac os environment) even for non technical people. http://www.sqltabs.com/