phpCacheAdmin is a Web application for administrating and debugging Memcached. It allows you to delete or view the current contents of the server and specify the output cache time. It also has the potential to be expanded to xDebug, FileCache, radishes, and other types of caches.
Membase is a distributed key-value database management system, optimized for storing data behind interactive Web applications. Membase automatically spreads data and I/O across servers. This "scale out" approach at the data layer permits virtually unlimited growth of transaction capacity, with linear increases in cost and constant per-operation performance. Membase is in production behind thousands of applications, from shared-server deployments at Heroku to dedicated Membase clusters with hundreds of servers at Zynga and NHN.
OpenSourceClassifieds is LAMP software for creating highly-scalable classified ad websites. It supports general ads or specialized ones through plugins (cars, jobs, real estate, dating, etc.), many languages, lots of options for customization, integration with TinyMCE for WYSIWYG editors for rich formatting, extensibility through plugins (Google Analytics, Google Maps, Time elapsed, etc.), an interchangeable look and feel with themes, search engine (SEO) features (Sitemap.xml generation, robots.txt, nice URLs), an integrated search engine with full text support, an unlimited number of categories and sub-categories, and out-of-the-box anti-spam facilities (Akismet, Re-captcha).