At Polyconseil, we use a lot of open source software. We try to contribute back by providing patches, and sponsoring / participating in conferences. Also, we publish some of our tools under an open source licence. Here below is a list of projects that we have published so far and/or actively maintain.
In addition to these projects, Polyconseil staff members participate actively in external open source projects:
You can follow us on Twitter to get updates. We also publish a few articles in our technical blog.