Productz.com - Crowdsourced products database
GSMArena - GSMArena is an online site that offers exhaustive and up and coming cell phone data.
Diffen - Compare anything to find similarities and differences. Read, improve or create comparisons.
Kimovil - Compare price, specs, reviews and benchmarks for smartphones and tablets.
Virus Bulletin - Virus Bulletin is a security information portal, testing and certification body with a formidable...
AwesomeSearch - A search engine aggregating multiple Awesome-lists, which are curated lists of software related projects, mostly on Github.