Apache Rave is a new web and social mashup engine. It will provide an out-of-the-box as well as an extendible lightweight Java platform to host, serve and aggregate (Open)Social Gadgets and services through a highly customizable and Web 2.0 friendly front-end. Rave is targeted as engine for internet and intranet portals and as building block to provide context-aware personalization and collaboration features for multi-site/multi-channel (mobile) oriented and content driven websites and (social) network oriented services and platforms. For the OpenSocial container and services the (Java) Apache Shindig will be integrated. At a later stage further generalization is envisioned to also transparently support W3C Widgets using Apache Wookie.

ffox extension that enables mashups

my walk score is 89.

LOTS of mapping and GIS mashup tools.