Appcrawlr is the leading app discovery platform based on an advanced semantic search engine to help you find the best apps for iOS and Android.

Free Software Directory (FSD) catalogs free software that runs under free operating systems - particularly GNU and Linux.

JSter is a catalog of javascript libraries.

Linux App Finder's mission is to catalog useful GNU/Linux programs and provide a great resource to discover new apps.

Open HUB is a website to discover, track and compare open source projects.

Product Hunt is a website that lets users share and discover new products.

Cloud Surfing is a review platform for web 2.0 apps, tools, and services, aggregating all web 2.0 information into a single resource.

Gizmos Freeware Reviews is a freeware reviews platform.

Libre Projects is a collection of open source, usable, hosted web services.

Moreofit is a website similarity search engine. Give moreofit a website you're interested in, and it'll suggest to you alternative highly related and popular …

Open Source Software Directory lists many open source and free softwares.

Quora is a question-and-answer site where questions are asked, answered, edited and organized by its community of users.