GSMArena - GSMArena is an online site that offers exhaustive and up and coming cell phone data.
Google Developer Portal - Everything you need to build better apps.
Kimovil - Compare price, specs, reviews and benchmarks for smartphones and tablets.
i-DOCS - Get the latest Microsoft documentation for end users, developers and IT professionals: API reference, code examples, technical documentation, and more.
Productz.com - Crowdsourced products database
AWS Self-Paced Labs - Self-paced training labs help you test products and gain practical experience working with AWS - learn on-demand at your own pace.