The Infinum's WordPress boilerplate is the basis of every WordPress based project we use at Infinum.
The repository can be found here.
The Infinum's WordPress boilerplate is an easy way to kickstart your WordPress development using modern programming practices. We wanted to utilize all the advantages of the best PHP practices, which is why we used namespacing to ensure avoiding any possible class, method and function clashes in the global namespace. We also implemented the autoloader which means you no longer need to manually require your classes. Just instantiate them and the autoloader will take care of the rest. With the added performance boost.
There are other added bonuses that you can explore by reading the readme of the project.
This is the in-depth documentation on how to run and modify the WordPress boilerplate code. The intended usage of this boilerplate is to introduce modern front-end development tools to WordPress.
Read the readme of the project to get going with the theme development.
For more information about the boilerplate check out the official wiki page.