What Does Jigsaw Mean?

Jigsaw is an open-source web server platform developed by the World Wide Web Consortium (W3C) that provides sample HTTP 1.1 implementation, advanced Java architecture and other features. It is considered a premier experimental platform for WC3 and the Internet community as a whole.

Techopedia Explains Jigsaw

Jigsaw 2.0 is designed for technology demonstration purposes; it is not a full-fledged, ready-to-use web server. It is designed as a project to portray new technology advancements for future HTTP and object-oriented web servers.