An extensive list of Chemical Engineering related sites: ChemEngInfo – Chemical Engineering Information Sources, by Eugénio Ferreira, professor at Universidade do Minho. In this page one can find links to other interesting sites from the same author, for instance, EngineeringInfo – Engineering Information Sources and EnviroInfo – Environmental Information Sources.
The History of Chemical Engineering, according to Wayne Pafko. This site has a simple layout and it is very well organized. The author accepts contributions, in order to complement the information that is already online. It is possible to download a version of the site in pdf format. This History of Chemical Engineering is a good starting point for those who are interested in this subject.