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Versus - Find popular alternatives to anything in a jiffy
Liist.cc - A tool that turns your photos, notes, and maps into shareable recommendations - fully automated.
Kimovil - Compare price, specs, reviews and benchmarks for smartphones and tablets.
Likewise - Get recommendations you love, from people you know.
GSMArena - GSMArena is an online site that offers exhaustive and up and coming cell phone data.