I know mine has. We weren't a big shop, but we donated to the OSS software companies that created the software we used. Each month, we took ~200 dollars and gave it to one of a long list of OSS companies, some of which include:
WordPress Foundation
Bamboo Invoice
Apache Foundation
~half a dozen really clutch guys who developed obscure but awesome plugins
LibreOffice
Flowplayer
Just to name a few.