Here's a list of bundles I would suggest to use on every project that needs them. I will do my best to keep it updated, but please feel free to send PR.
- NelmioApiDocBundle: Generates documentation for your REST API from annotations
- JMSSerializerBundle: bridge for serialization (and de-serialization) library
- KnpGaufretteBundle: file system abstraction
- VichUploaderBundle: helps you to manage file uploads (supporst Gaufrette, Amazon S3 and a lot of other adapters)
- LiipImagineBundle: assist in imagine manipulation using the imagine library
- TrsteelCkeditorBundle: easy integration of the CKEditor WYSIWYG
- LiipFunctionalTestBundle: helps you in functional tests
- FOSUserBundle: the Symfony2 user management standard de facto