I am the architect and main developer of a number of opensource projects. They are written in Java 7/8 and Java EE 7, with strong OOP principles in mind. These projects are usually the basis of the articles on this blog, meaning that I tried most of the ideas that I write about and saw that they are indeed applicable.

You can find them under my Github profile or in one of these two organizations: opencharles and decorators-squad.

Some worth mentioning are:

If you find one of these projects interesting, feel free to contribute either by filing Issues or by providing a Pull Request (ideally no more than 5 changed files, including tests).

amihaiemil's Github chart