Challenge HN: Support Open Source Software

I don't think any of our startups would exist without open source software. We use free operating systems, compilers, scripting languages, databases, web servers, content management systems... where would your startup be if you had to pay for all of these? I think those of us with successful startups owe it to those who came before us to help out those who come after us.

Stripe supports open source software by running an open source retreat. Tarsnap doesn't have unicorn-scale resources, but sponsors FreeBSD developer summits and the FreeBSD Foundation. How does your startup contribute back?