SocialCompare - Platform of User-generated collaborative and interactive comparison tables.
Graphiq - Vivid, contextually-rich visualizations of the world's deepest knowledge graph.
vsChart.com - With vsChart.com you can compare products and a lot more.
Versus - Find popular alternatives to anything in a jiffy
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
Product Chart - A new way to discover products.