Alternativeto.net allows people to add apps, upvote, and downvote from their own experience while other sites only provide the so called 'Expert Review/Recommendation'. Alternativeto.net is more impartial.

Full website with lots of content, info, users, comments, etc. Value for free.

AlternativeTo makes it easy to quickly find stuff. The lists are organized by likes which floats the best content to the top, and helpful tags warn you of undesirable attributes (such as the product being discontinued or if it includes bundleware).