Xerl is an open source website template engine (TE) with some features of a Content Management System (CMS) programmed in object oriented Perl (boosted by FastCGI) and using XML.
Fype is an attempt to build an open source scripting language from scratch (just for fun) using C99 on the FreeBSD operating system. Fypes focus is to use as few dependencies on 3rd party libraries as possible and to use as less code as possible and a very small execution binary!