The CmapTools program empowers users to construct, navigate, share and criticize knowledge models represented as concept maps. It allows users to, among many other features, construct their Cmaps in their personal computer, share them on servers (CmapServers) anywhere on the Internet, link their Cmaps to other Cmaps on servers, automatically create web pages of their concept maps on servers, edit their maps synchronously (at the same time) with other users on the Internet, and search the web for information relevant to a concept map.
Spybot-S&D has long grown a full-time job for me and causes quite a lot of work for our volunteers. I am working hard and it is great fun to do it. Of course all the infrastructure we use causes costs, and I have got to live on something, but at the same time I believe in free software. Therefore I decided to keep Spybot-S&D free and give you the freedom to decide if and how much it is worth to you.