10. AlternativeTo.net and Other Software Search Engines
One of the most popular ways to search out software is heading to a web site like the very popularAlternativeTo.net, where you can punch in the name of a program and get a list of all other similar programs for any platform. AlternativeTo is the most popular, though other sites like previously mentionedOSalt.com—which specifically finds open source alternatives to commercial software—are great options too.
9. App Recommendation Engines
If you're looking for apps on your mobile phone, recommendation engines like previously mentionedStumbleUpon for Android or Chomp on the iPhone. Instead of just offering suggestions of similar software, both recommend apps based on what you (and others with similar taste) already like and use. It's a good way to get app suggestions tailored to your specific style.