What apps are out there besides "Lithium Community" for customer-facing user community creation?

My boss asked me to find a list of companies that would be good for developing/deploying an on-line community. I did some early research and found Lithium Communities that looks pretty mature/solid, but I know there are others out there (Jive? Yammer?). Can any of you share with me some ideas about which one you deployed and why? I am looking for something with a robust set of features out of the box (so please, don't tell me to build something with PHPBB or vBulletin), is expandable, is relatively easy to deploy and has great support. My goal is to buy this system before the end of Sept so I don't have much time and then hope to have the system up and running before the end of the calendar year. Thanks!
Answer:

Jive and Yammer are for Internal Communities. Lithium Technologies are focused on External brand communities (where internal folks can also participate of course)

Timothee Wirth at Quora Visit the source

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Other answers

Enabee should be on that List: http://www.enabee.comIf you are still looking, feel free to drop us a line and I can walk you through.

Henning Lueke

I recommend http://copiny.com/ - Customer community platform for support & feedback. Free plan, clear design and powerful functionality. Evernote uses it for customer support.

Dmitry Chistov

Customer engagement communities are the perfect case for using http://www.kutpoint.com.

Sinisa Rakovic

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