Tachometry Corporation
In addition to the software integration services we provide for our clients, we use a significant amount of open source software internally to run our own operation. Literally everything we do for ourselves and our customers has significant OSS integration. From our phones, to our laptops and servers, our accounting system, even this web site, we "practice what we preach" in using all the best the open source community has to offer.
This list is provided as a small sampling of some of our favorite open source projects.