Yesterday, there were three significant open source related M&A announcements – a merger and two acquisitions. I listed these in the 451 CAOS Links post already, but they are deserving of a unique post. A quick summary…

Yahoo! Announces Agreement to Acquire Zimbra, Yahoo (Press Release)

Yahoo! Inc. (NASDAQ:YHOO), a leading global Internet company, today announced that it has entered into a definitive agreement to acquire Zimbra, Inc. (www.zimbra.com), a leader in next generation e-mail and collaboration software. Under the terms of the agreement, Yahoo! will acquire Zimbra for approximately $350 million.

Univa and United Devices Merge, Univa / United Devices (Press Release)

Univa and United Devices (UD), pioneers in the grid computing and cluster software arenas, announced today that the companies have merged. The combined entity, “Univa UD,” will offer a comprehensive set of cluster and grid solutions based on open source and proprietary components.

ActiveGrid Acquires TurboAJAX Group, ActiveGrid (Press Release)

ActiveGrid, Inc., a leading provider of Enterprise Web 2.0 solutions, has announced the acquisition of the TurboAJAX Group, a leading provider of JavaScript components built on the Dojo Toolkit. The TurboAJAX Group provides some of the most impressive components available for the creation of AJAX-style web applications.