Complex sentence: Ingres Database is fully open source with a growing global community of contributors, but Actian Corporation controls the development of Ingres and makes certified binaries available for download, as well as providing worldwide support.
Split into simpler sentences: Ingres Database is fully open source with a growing global community of contributors. However, Actian Corporation controls the development of Ingres and makes certified binaries available for download, as well as providing worldwide support.