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.
Forekast - Events on Forekast are posted and voted on by the community.
SimilarSites - Easily find more sites like those you like.
PodBooker - The easiest way to get booked on podcasts
Top Similar Sites - Top Similar Sites helps you find similar, alternative or related sites to any website instantly.
Speaker Directory by HeySummit - Guests for your next event or podcast (or submit yourself!)