PHP Server Monitor is a script that checks whether your websites and servers are up and running. Features include monitoring services and websites, email, SMS and Pushover.net notifications and history graphs of uptime and latency.
Nikola generates static websites and blogs, with feeds, comments, media galleries and an archive. Content can be authored in reStructuredText, Markdown/CommonMark, Wiki, BBCode, Textile, AsciiDoc, Python Notebooks, Misaka, Pandoc, txt2tags, orgmode, or plain HTML. It also provides code sections with syntax highlighting, is multi-lingual, fully themeable, and can utilize external tools. It's foremost rather fast and its static pages don't have further webserver requirements.
Open Classifieds is a PHP script for advertisement / listings. It's search engine optimized, lightweight and customizable. It provides templates, Paypal support, social logins, customized fields, sitemap ad robots.txt features, widgets, akisment and captcha integration, twitter, google maps, and requires only PHP and MySQL.