selfoss is a multipurpose RSS reader, live stream, mashup, and aggregation Web application. You can register RSS feeds, and this Web-based PHP application will continuously fetch new RSS feed items. The items will be shown in a stream. You can also add other sources, like deviantart, Twitter, or tumblr users. Attaching new sources is very easy, and you can add any source you want (e.g. IMAP email account, log files, etc.). selfoss also allows you to collect all your postings on different communities (e.g. Twitter, your blog, etc.) and show it in one place. It features a Web-based RSS reader, universal aggregator, mobile support (Android, iOS, and iPad), and support for MySQL, SQLite, and MongoDB databases. It is easy extensible with an open plugin system (write your own data connectors). It is a lightweight PHP application taking up less than 2 MB.
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).