Sun Grid Engine @ Oracle

Sun Grid Engine used to be available as an Open Source product.
With the purchase of Sun by Oracle, the product will be called Oracle Grid Engine.
Future Oracle Grid Engine versions will no longer be open source.The current version of Oracle Grid Engine is 6.2 update 7.
The Open Source version at the time of the transition (6.2 update 5) was moved to SourceForge and re-branded to Open Grid Scheduler. There is limited activity and progress on the open source project.
Univa provides commercial support for the open source product at $100 yearly per core. Univa also sells a product with closed source extensions as Univa Grid Engine version 8.

Oracle recently reversed its policy of commercialising Sun open source projects for some products that successfully forked:

• Oracle stopped the commercial version of OpenOffice (but AFAIK the ODF 1.2 plugin for MS Office is still not free)
• Oracle proposed to moved control of Hudson to the Eclipse foundation, after the fork of Jenkins

I doubt that a similar move will happen for Grid Engine