FGL is a tightly-integrated self-contained development & execution environment utilizing best-of-breed programming tools and methodologies, optimized web/application server, highly-scalable relational/object database, and robust extension interface.
Reptile is a web server made in Python. It supports server side scripting with "Embedded Python", PHP, and CGI scripts.
It has an integrated HTML/XML validator that checks the pages before publication and others handy features.