A great product can only improve with the expertise of the larger community.  Liferay is a free, open source project that can be continuously improved and extended.  The Developer Zone allows you to do just that.

We provide documentation on key features of Liferay. If you find yourself running into problems, we also have an active user forum. Help us with our short-comings by submitting bug reports, feature requests, and code contributions at our support site.