The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model. The DataStax Cassandra SF User Group is a highly awesome meetup group, bringing together cool people distributed across the bay area to talk about our favorite NoSQL implementation, Apache Cassandra.

For people interested in Apache Mahout machine learning libraries, or interested in learning about machine learning in general.

Hello World! This is a group for Apache Wicket users in the SF bay area to meetup for discussions, panels, presentations, forums, and other events! Open to all types of wicket users

The Bay Area meetup for all things workflow and process automation related. Why not come together for business and technical discussions? From how to add forms to workflow, to getting started with BPM, let's share our experiences here. Brownie points if you're also an Open Source and/or Java wiz.

We are developers helping other developers learn about full-text search. For our first meetup, we will be talking with IndexTank, a hosted solution currently used by many developers as well as large companies such as Reddit.com We will discuss how to quickly get search implemented using IndexTank's services, as well as discuss other search alternatives.

This group has been created to bring together users of Alfresco Content Management. Technical and non-technical users are invited to become a member to exchange information, code, use cases, case studies, demos, ideas and to make new friends.

Come join the Bay Area TYPO3 Users Group. Whether you are totally new to TYPO3 or a seasoned developer interested in networking with other TYPO3 users, this is the place to expand your skills and do a little networking. http://typo3.org http://www.linkedin.com/groups?gid=25... San Francisco TYPO3 Camp

A group devoted to the use and development of open source, big data, agile intelligence solutions, for the San Francisco Bay area. Join our group if interested in solving real business problems utilizing open source, big data analytical solutions.

Share your Elasticsearch knowledge - with an elastic definition of what 'sharing' means. We have a place (in the financial district), and a pizza + beer budget. Let's meet, talk, and take it from there!