
ActivityPub is an open, decentralized social networking protocol based on Pump.io's ActivityPump protocol. It provides a client/server API for creating, updating, and deleting content, as well as a federated server-to-server API for delivering notifications and content.

AlterGeo, formerly known as Wi2Geo, is a Russian IT company specializing in the development of a global hybrid positioning system which combines Wi-Fi, WiMAX, GSM, GPS, LTE, IP address and network environment approaches. It also created cross-platform location-based services Gvidi and AlterGeo, and hyperlocal banner ad system Local Hero.

Apache Wave is a discontinued software framework for real-time collaborative editing online. Google originally developed it as Google Wave. It was announced at the Google I/O conference on 28 May 2009.

BibSonomy is a social bookmarking and publication-sharing system. It aims to integrate the features of bookmarking systems as well as team-oriented publication management. BibSonomy offers users the ability to store and organize their bookmarks and publication entries and supports the integration of different communities and people by offering a social platform for literature exchange.

Cisco Eos was a software platform for Media & Entertainment (M&E) companies developed by the Cisco Media Solutions Group.

Online dating is a system that enables people to find and introduce themselves to potential connections over the Internet, usually with the goal of developing personal, romantic, or sexual relationships. An online dating service is a company that provides specific mechanisms for online dating through the use of Internet-connected personal computers or mobile devices. Such companies offer a wide variety of unmoderated matchmaking services, most of which are profile-based.

Digg is an American news aggregator with a curated front page, aiming to select stories specifically for the Internet audience such as science, trending political issues, and viral Internet issues. It was launched in its current form on July 31, 2012, with support for sharing content to other social platforms such as Twitter and Facebook.

Facebook 3D Posts was a feature on the social networking website Facebook. It was first enabled on October 11, 2017 by introducing a new native 3D media type in Facebook News Feed. Initially the users could only post 3D objects from Oculus Medium and marker drawings from Spaces directly to Facebook as fully interactive 3D objects. The feature was available for desktops and mobile phones that support the underlying WebGL API.

The Facebook like button is a feature on the social networking website Facebook. It was first enabled on February 2009. The like button enables users to easily interact with status updates, comments, photos and videos, links shared by friends, and advertisements. Once clicked by a user, the designated content appears in the News Feeds of that user's friends, and the button also displays the number of other users who have liked the content, including a full or partial list of those users. The like button was extended to comments in June 2010. After extensive testing and years of questions from the public about whether it had an intention to incorporate a "Dislike" button, Facebook officially rolled out "Reactions" to users worldwide on February 24, 2016, letting users long-press on the like button for an option to use one of five pre-defined emotions, including "Love", "Haha", "Wow", "Sad", or "Angry". Reactions were also extended to comments in May 2017, and had a major graphical overhaul in April 2019.

GNU social is a free and open source software microblogging server written in PHP that implements the OStatus standard for interoperation between installations. While offering functionality similar to Twitter, GNU social seeks to provide the potential for open, inter-service, and distributed communications between microblogging communities. Enterprises and individuals can install and control their own services and data.

Grabyo is a browser-based live video production suite integrated with popular social media platforms such as Facebook, YouTube, Instagram, Snapchat, Twitter and Periscope. The cloud-based technology is used by sports federations and media companies to produce professional-quality live streams and video clips for digital audiences.

IGTV is a standalone video application by Instagram for Android and iOS smartphones. It allows for longer videos compared to Instagram feeds. While IGTV is available as a stand-alone app, basic functionality is also available within the Instagram app and website.

Kune is a free/open source distributed social network focused on collaboration rather than just on communication. That is, it focuses on online real-time collaborative editing, decentralized social networking and web publishing, while focusing on workgroups rather than just on individuals. It aims to allow for the creation of online spaces for collaborative work where organizations and individuals can build projects online, coordinate common agendas, set up virtual meetings, publish on the web, and join organizations with similar interests. It has a special focus on Free Culture and social movements needs. Kune is a project of the Comunes Collective.

A like button, like option, or recommend button is a feature in communication software such as social networking services, Internet forums, news websites and blogs where the user can express that they like, enjoy or support certain content. Internet services that feature like buttons usually display the number of users who liked each content, and may show a full or partial list of them. This is a quantitative alternative to other methods of expressing reaction to content, like writing a reply text. Some websites also include a dislike button, so the user can either vote in favour, against or neutrally. Other websites include more complex Web content voting systems, for example five stars or reaction buttons to show a wider range of emotion to the content.

Movim is a distributed social network built on top of XMPP, a popular open standards communication protocol. Movim is a free and open source software licensed under the AGPL. It can be accessed using existing XMPP clients and Jabber accounts.

Tween is a Twitter client for Microsoft Windows, and written in Visual Basic .NET. It is one of the most popular Twitter clients in Japan, and it is open-source.