SlideShare

A social media platform where people share presentations and infographics.

Stack Overflow

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

A Chinese microblogging website.

Keybase

A key directory, secure messaging and file sharing platform.

Yelp

An American crowd-sourced review platform where users publish ratings and written feedback about local businesses.

Meetup

A social media platform for organizing in-person activities and meeting people in your local area.

Google Groups

A Google service that provides discussion groups for people sharing common interests.

Academia

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

Steam Community

A social networking site for gamers.

Goodreads

A book-based social media platform owned by Amazon.

Kununu

An online employer review and workplace transparency platform focused on German-speaking countries, where current and former employees rate companies and share job-related experiences.

Flipboard

A social news aggregator and content discovery platform.

ReverbNation

A social networking site for musicians.

Ravelry

A community website for knitters, crocheters, and fiber artists.

Scribd

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

Strava

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

Micro.blog

A microblogging and social networking service.

Lemmy

A decentralized social link aggregator platform running on independent servers and powered by the open-source Lemmy software.

Letterboxd

A social media platform for film lovers.

Quora

A question-and-answer platform where users can ask questions and provide answers on a wide range of topics.

WeChat

A Chinese instant messaging, social media, and mobile payment app that has evolved into a super-app combining communication, commerce, and everyday services.

Last.fm

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

Kaggle

A platform for data science and machine learning that offers a variety of resources, including datasets, code repositories, and tools for building and deploying machine learning models.

Gitter

An open-source chat and networking platform for software developers based on the Matrix protocol.

Douyin

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