DuckDuckGo ( https://duckduckgo.com/ ) could be useful in the search engine list that comes by default in Icecat. It has great features and an excellent privacy policy.
Also, see ( http://www.gabrielweinberg.com/blog/2010/11/help-me-start-a-foss-tithing-movement.html ). Regards. -- http://gnuzilla.gnu.org
