Friend recently asked me what is all there under the hood in SugarCRM. Most programmers who come from J2EE and C++ background have a tendency to expect complexity as part of enterprise software.
Like something has to be hard!
List of APIs written by wonderful folks at SugarCRM and few coming from open source community:

Sugar - The [...]

Angel.com, provider of on-demand call center and Interactive Voice Response (IVR) solutions, recently announced the Angel.com SugarCRM Connector:
With the SugarCRM Connector, Angel.com makes it possible to access, update and manage accounts, contacts and leads using voice commands over the phone. Users can record details from a recently completed meeting, set a follow-up task or dial [...]

Open source saves money. Less money spent on complex sales cycle, more effort going in bottom up innovation, it has clearly won the hearts and minds of implementors in IT food chain. What has traditionally been difficult was to conclusively win this debate at the ’suit’ level. CFOs had their concerns, in some cases valid, [...]