NoSQL

http://nosql-database.org/
http://www.slideshare.net/sebastiengoasguen/cloudstack-and-bigdata
http://en.wikipedia.org/wiki/NoSQL

Classification based on feature:

• Wide Column Store / Column Families
• Document Store
• Key Value / Tuple Store
• Graph Databases
• Multimodel Databases
• Object Databases
• Grid & Cloud Database Solutions
• XML Databases
• Multidimensional Databases
• Multivalue Databases
• Event Sourcing
• other...