We started with web browsers made using Visual Basic .NET. Then, we discovered Poncho's OSDEV tutorial and started experimenting with operating systems. We eventually landed on desktop applications and operating systems alongside few projects in other areas.
Other major contributors:
They are FOSS, free and open source. Some projects can be licensed under different terms if worked in partnership with third party.
Just look chart down below.
This is data for repository's main language (repo count)!