Which vendors offer free licenses for use of their products in F/OSS projects?
Which vendors are known to offer free licenses of their otherwise paid and propreitary software in support of [Free and Open Source Software (F/OSS)][1] projects?

Where possible, please provide a link to the product and the page where the free license offer for F/OSS projects is mentioned. For example, “[Open Source License][2] for [ReSharper][3] by [JetBrain][4]”


  [1]: http://en.wikipedia.org/wiki/Free_and_open_source_software
  [2]: http://www.jetbrains.com/resharper/buy/buy.jsp#openSource
  [3]: http://www.jetbrains.com/resharper/
  [4]: http://www.jetbrains.com/
Which vendors offer free licenses for use of their products in F/OSS projects?
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Which vendors are known to offer free licenses of their otherwise paid and propreitary software in support of [Free and Open Source Software (F/OSS)][1] projects?

Where possible, please provide a link to the product and the page where the free license offer for F/OSS projects is mentioned. For example, “[Open Source License][2] for [ReSharper][3] by [JetBrain][4]”


  [1]: http://en.wikipedia.org/wiki/Free_and_open_source_software
  [2]: http://www.jetbrains.com/resharper/buy/buy.jsp#openSource
  [3]: http://www.jetbrains.com/resharper/
  [4]: http://www.jetbrains.com/