ITtoolbox (Popularity: )
http://supplychain.ittoolbox.com/ IT directory and community for supply chain professionals. Focusing on process optimisation, advanced planning and scheduling, industrial engineering and supply chain management.
EEVL (Popularity: )
http://www.eevl.ac.uk/ Directory of engineering, mathematics and computing. Sub-categories include software for aerospace, defence and bioengineering; software for statistical, geometric and numerical analysis and tools for software engineering.
CL!Psci Search Engine (Popularity: )
http://www.clipsci.com/ CL!Psci Scientific Search Engine: Fastest, most efficient free search engine for scientific researchers. The CL!Psci Scientific Search Engine is a superfast and efficient, free Google-like software, designed to meet the ...