Top Alternatives to RetroShare

Deluge is a lightweight, Free Software, cross-platform BitTorrent client.

Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.

Discord is a freeware proprietary VoIP application designed for gaming communities.

Signal is the most scalable encryption tool.

eMule is a free peer-to-peer file sharing application for Microsoft Windows. Started in May 2002 as an alternative to eDonkey2000, eMule now connects to both the eDonkey network and the Kad network.

KTorrent is a BitTorrent client that is part of the KDE Software Compilation.

Soulseek is a peer-to-peer (P2P) file-sharing network and application.

rTorrent is a text-based ncurses BitTorrent client written in C++, based on the libTorrent libraries for Unix.

Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.

Privacy enhanced BitTorrent client with P2P content discovery.

GNUnet is a free software framework for decentralized, peer-to-peer networking and an official GNU package.

Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another person, or to multiple subscribers.

Halite (named after the mineral) BitTorrent client based on the excellent libtorrent library.

FilePizza is a free peer-to-peer file transfers in your browser.

TorChat is a decentralized anonymous instant messenger that uses Tor hidden services as its underlying network. It provides cryptographically secure text messaging and file transfers.

OneSwarm is a privacy-preserving P2P client.

Ares Galaxy is a P2P client that automatically finds more sources and downloads files from many users at once. Increase the speed of your downloads, and enjoy one of the most easy-to-use BitTorrent clients.

Calypso is a cross platfrom file sharing client using the anonymous network MUTE. Developed using C++ and Qt, Calypso is portable to Windows, Linux, and other environments.

Shareaza is a peer-to-peer file sharing client running under Microsoft Windows which supports the gnutella, Gnutella2 (G2), eDonkey, BitTorrent, FTP, HTTP and HTTPS network protocols and handles magnet links, ed2k links, and the now deprecated gnutella and Piolet links.

Twister is a peer-to-peer microblogging software.

Bit Chat is a secure, peer-to-peer, open source instant messenger with end-to-end encryption.

Echoplexus is an anonymous, web-based, IRC-like chatting platform that makes its best effort to respect your privacy.

Demonsaw is a secure, anonymous, free, and decentralized x-platform information-sharing application with end-to-end encryption and no client P2P.

MLDonkey is an open source, multi-protocol, peer-to-peer file sharing application that runs as a back-end server application on many platforms.

Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.

Ricochet uses the Tor network to reach your contacts without relying on messaging servers.