Viber

A free, cross-platform instant messaging and calling application owned by Rakuten.

QQ

A Chinese instant messaging software platform.

VK

A Russian social media and social networking service that allows users to communicate, share content, and join online communities.

Quora

A question-and-answer platform where users ask, answer, edit, and organize discussions across a wide range of topics through community-driven knowledge sharing.

Meetup

A social media platform for organizing in-person and virtual events and connecting people who share interests, hobbies, or professions.

SlideShare

A content-sharing platform for publishing and discovering presentations, infographics, documents, and professional knowledge resources online.

Snapchat

A messaging and social networking app that lets users send photos and videos ("Snaps") that disappear after being viewed by default.

Academia

A social networking platform for academics that enables users to share research papers, build professional profiles, and connect with other researchers worldwide.

Goodreads

A book-based social networking platform owned by Amazon that helps readers discover, organize, and discuss books.

Steam

A digital distribution platform and online storefront developed by Valve Corporation for purchasing and downloading video games and software.

ResearchGate

A social networking platform for scientists and researchers that enables them to share publications, collaborate with peers, and engage in academic discussions online.

Beehiiv

A newsletter platform that allows creators and brands to publish, distribute, and monetize email publications with integrated website hosting and audience management tools.

Strava

A fitness tracking app and community-moderated social network for athletes.

Flipboard

A social news aggregator and content discovery platform.

Scribd

A digital document library and reading subscription service that provides access to millions of e-books, audiobooks, magazines, and user-uploaded documents.

Douyin

A short video platform, essentially the Chinese version of TikTok.

Stack Overflow

A question-and-answer platform for programmers where users can ask, answer, and vote on technical questions related to software development.

Google Groups

A web-based mailing list and discussion forum platform that enables users to communicate through shared email addresses and web-based discussions.

Pixnet

A Taiwanese mobile photo sharing, blogging, and social networking service.

Douban

A Chinese social networking site and media database for books, movies, music, and local events.

Naver Blog

A free blogging platform operated by the South Korean company Naver.

Last.fm

A music streaming and discovery platform with internet radio and a community for music discussion.

Steam Community

A social networking service integrated with Steam that allows players to connect, communicate, and share gaming-related content.

Product Hunt

A platform for discovering and sharing new technology products, including apps, tools, and services.

HackerOne

A cybersecurity platform that connects businesses with ethical hackers, penetration testers and cybersecurity researchers.