DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Banana Dance Wiki/CMS - Free open source software combining the best of wiki and CMS with community building-features.
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
TiddlyWiki - a non-linear personal web notebook
PrestaShop - Create your online store with PrestaShop's free shopping cart software. Build an ecommerce website for free and start selling online with hundreds of powerful features.