The JPL Server Monitor will check to ensure websites and server services are running and responding. It also tracks the response time of the site/service. There is a cron script that can be activated to automate the checks.
Pi3Web is a multithreaded, highly configurable multiple platform HTTP 1.0/1.1 web server written in C++. Pi3Web 2.0 supports among other things CGI, FCGI, Win-CGI, SSI, directory indexing, SSL, embedded perl, PHP4, Servlets, JSP and XSLT.
MacOsX Finder like browser for UN*Xes with Win* like Control Panel function. Requires firefox (due to XUL support) and SQLite for meta data search (similar to spotlight)