In-Portal is described as 'Free and open-source content, news, directory management and a discussion forum. Shopping cart and WordPress plugin available' and is an app in the Business & Commerce category. There are three alternatives to In-Portal for a variety of platforms, including Self-Hosted solutions, Windows, Linux, Mac and Online / Web-based. The best alternative is Tiki Wiki CMS Groupware, which is both free and Open Source. Other great apps like In-Portal are Composr (Free, Open Source) and b2evolution (Free, Open Source).
"With Composr, we are committed to using our experience and talents to keep the web open, to empower teams to build sophisticated sites with elegance and efficiency, and to carry the web forward with the highest of standards."