Dr. Geo II is a complete rewrite of Dr. Geo 1.1 GTK for the Squeak/Smalltalk environment. Dr. Geo is a project of the OFSET, Organisation for Free Software in Education and Teaching.
Eukleides is a Euclidean geometry drawing language. Two softwares are related to it. First, eukleides, a compiler which allows to typeset geometric figures within a (La)TeX document. This program is also useful to convert such figures in EPS format or in various other vector graphic formats. Second, xeukleides, a GUI front-end which makes possible to create interactive geometric figures. This program is also useful to edit and tune some Eukleides code.
CaRMetal is based on C.a.R. : it includes all of its functionalities - or almost - but follows a different approach from the graphical interface point of view. It's not just a different design - which would not make sense - but instead it gives another way to reach functionnalities.
I posted an updated tech demo of RhNav - Rhizome Navigation visualizing user behavior of this blog. The graph is now centered around the page where most time is spent. Noise created by search engine robots is filtered which should clear things up quite a