Slant!

AlternativeTo let you find new Windows, Mac, Linux, online and mobile software based on applications you already know instead of useless categories. AlternativeTo is a new approach to finding good software. Tell us what application you want to replace and we give you suggestions on great alternatives! Instead of listing thousands of more or less crappy applications in a category, we make each application into a category. Think of it like forever evolving blog posts about good alternatives to the software that youre not satisfied with. And the "blog posts" are generated by you through suggestions, comments and votes. »

Quora.com is a question/answer service allowing users to pose questions that other users can answer, each question and answer can have comments, each users can write one individual answer and there can be a summary answer.Each user can choose a description explaining their area of expertise or questions and answers can be anonymous.Questions and answers are searchable.

Stack Exchange is a fast-growing network of 84 [and counting] question and answer sites on diverse topics from software programming to cooking to photography and gaming. We are an expert knowledge exchange: a place where physics researchers can ask each other about quantum entanglement, computer programmers can ask about JavaScript date formats, and photographers can share knowledge about taking great pictures in the snow.

Easily find more sites like those you like. Similar Sites helps you find related sites and alternatives based on community recommendations and computer analysis.

Software Informer is a programme, whose primary aim is to give you the up-to-date information about the software you actually use. Whenever a more recent version of any programme becomes available, Software Informer notifies you and offers a link for downloading the update. It also allows you to keep track of comments and questions on corresponding software.Not only that, but also a whole software-related social network paired with our siClient program, where you will be able to: Get notifications about important software updates Find a perfect program according to your needs Ask questions and get feedback from experienced users Share your opinions Meet people with similar interests And much more. »

Open HUB is an open source directory that anyone can edit. It features comprehensive metrics and analysis on thousands of open source projects.

Mevvy is an app discovery platform that follows a different concept - we categorize apps by interest group, and help you discover the apps that truly matter to you - whether you are a parent, a pilot, a marketing strategist or an athlete!

A directory of free & open source hosted web applications and alternatives to many proprietary web services.

Alternative.to is a search engine for alternatives, meaning it can search for existing oposites on any given subject, be it material or etheric things, words, phrase, people, phenomenons. In other words everything that exists in any form in the known universe.

Discovering new applications

SimilarSiteSearch helps you find similar, related, or alternative websites. It collects and combines information about websites from many sources including the site itself. The search engine generates a list of websites based on the similarity of topics and categories. It constantly crawls the Web to find new popular sites to provide users with fresh results.

SimilarPages has found and classified millions of interesting sites hidden due to low popularity with the goal of helping you discover and search a larger portion of the web.

An informational website about software alternatives for use on Linux.

Moreofit is the first (and best) website similarity search engine. Give moreofit a website you're interested in, and it'll suggest to you alternative highly related and popular websites to explore.