Ruby Toolbox - Explore and compare open source Ruby libraries
BlackBerry Hub - Download a free trial of BlackBerry Hub+ apps for Android phones running Lollipop 5.0 or higher. Boost productivity with BlackBerry Hub+ Inbox, Calendar, Launcher and more.
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.
Cloud Surfing - CloudSurfing is a one stop review source for web 2.
UserBit - A full-stack qualitative research platform for UX & product teams.
LibHunt - LibHunt tracks mentions of software libraries on relevant social networks. Based on that data, you can find the most popular projects and their alternatives.