Webcord
Get ready to turbocharge your Discord shenanigans with WebCord! Imagine a digital Swiss Army knife that buffs up your chat adventures with a cocktail of security shields, privacy fortifications, and snazzy Discord feature makeovers. It's like giving your Discord a superhero cape, complete with Electron / Chromium / Discord bug zappers, stylish wardrobes of stylesheets, and a VIP pass to the wrapped-up https://discord.com lounge. All while tip-toeing around the ToS like a pro ninja. Dive into this digital playground at http://yourhost:3000/ or slip into the secure backdoor at https://yourhost:3001/. Hosted on RepoCloud, this container is a KasmVNC Docker Baseimage prodigy, offering a smorgasbord of environment variables and configurations. Toggle on or off features to your heart's content, all while saving your wallet from the cloud hosting money monster!
Pidgin
Get ready to juggle your social life like a circus pro with Pidgin, the chat app that's like a Swiss Army knife for your digital conversations! Imagine being the puppet master of your chat universe, where you can simultaneously whisper sweet nothings into XMPP and gossip in an IRC channel without breaking a sweat. Pidgin is your VIP pass to the who's who of chat networks, including the cool kids like Discord and Slack, the old guard like ICQ, and even the elusive Skype and Telegram. It's like having a backstage pass to every concert in town! With a treasure trove of default and third-party plugins, Pidgin is like that friend who always brings the best snacks to the party. And with Firefox on board, you'll be solving captchas like a riddle master before you even enter the chat room. Just hop onto http://yourhost:3000/ or for the security enthusiasts, https://yourhost:3001/, and let the chatstravaganza begin! Hosted on RepoCloud, you'll be chatting more and paying less, because who says you can't have your cake and eat it too? So, let's get the digital party started with Pidgin, where every chat network is just a click away!
Element
Matrix's flagship client, built by the protocol's creators: Element brings the decentralized open standard for real-time communication to web, desktop, iOS, and Android. Paired with a Matrix homeserver, it delivers Slack-quality team messaging where you own every message, file, encryption key, and byte of metadata. End-to-end encryption is on by default, built on Olm and Megolm - the Double Ratchet algorithm family Signal popularized, extended for large-room scalability and publicly audited by NCC Group. Messages encrypt per-device with cross-signed device verification, so even a compromised server yields nothing readable. Federation is the defining capability: like email, users on different homeservers converse seamlessly, and 30+ bridges connect Matrix rooms to Slack, Discord, WhatsApp, and Telegram, so moving to sovereign infrastructure doesn't sever contact with anyone. Rooms support threads, reactions, file sharing, and voice and video calls via Element Call. The result is digital sovereignty chosen by governments and enterprises across Europe: your data sits on your server in your jurisdiction, portable to any other Matrix host because the protocol is an open standard. Apache-2.0 licensed, with no per-user fees at any scale.
Matrix Synapse
Step into the Matrix, where the future of chatter is not just bulletproof, but decentralised to boot! This app is your golden ticket to gabbing with pals, kin, digital tribes, and office allies in a virtual space that's as snug as a bug in a rug. Wave goodbye to the digital overlords and hello to a world where you're the architect of your own cyber sanctuary. Fancy yourself a bit of a builder? Go wild creating snazzy, sophisticated chat apps atop the mighty Matrix. Part of a bustling bazaar of clients, servers, and robotic minions (we mean bots), this open-source extravaganza is snugly housed on RepoCloud, where your wallet won't weep over hosting fees. So, whether you're itching to gab, code, or conquer the universe of decentralised discourse, Matrix is your trusty sidekick in the quest for communication liberation!
Mattermost
Teams that cannot send messages through someone else's cloud run Mattermost - the open-core, self-hosted alternative to Slack. It provides public and private channels, threaded discussions, unlimited search history, file sharing with previews, one-to-one audio calls, and screen sharing, with desktop clients for Windows, macOS, and Linux plus iOS and Android apps. Messages support full Markdown, which suits engineering conversations with code blocks and logs. Playbooks turn repeatable processes such as incident response and release management into checklist-driven workflows with automated triggers and retrospectives. Integration is a core strength: prebuilt connectors for GitHub, GitLab, Jira, ServiceNow, and PagerDuty, plus webhooks, slash commands, bots, a REST API, and a plugin marketplace with 700+ entries - together making it a working surface for ChatOps rather than just a chat room. Playbooks add keyword and event triggers, task assignment, status broadcasting, and post-incident retrospectives, so operational knowledge is not trapped in individuals' heads. The server is a single Go binary backed by PostgreSQL, with React clients, released monthly under MIT license and deployable fully air-gapped - which is why governments and defense organizations run it inside closed networks, and why the same control applies to any team with confidentiality requirements. The compiled Team Edition is free for unlimited users with no message history cutoff, so costs stay flat as the team grows.
The Lounge
"Forget about bouncers" became a real sentence because of The Lounge: a Node.js web IRC client that holds persistent connections to your networks 24/7, logging everything while you sleep, so closing the browser tab never means missing a message or losing your place in a channel. Open it again from any device - desktop, phone, tablet - and you resume exactly where you left off, with full history synchronized. Because it combines bouncer and client in one process, the experience feels like a modern chat app rather than 1990s infrastructure: push notifications for highlights and private messages (with self-generated VAPID keys, so even Web Push needs no third-party service), automatic link previews, inline file and image uploads, and full IRCv3 protocol support. It installs as a progressive web app from any modern browser, so phones get a native-feel client without an app store. Multi-user support means one instance serves your whole team or community, each user with their own networks and history, and LDAP integration ties into existing authentication. A public mode alternatively serves as an open, registration-free web chat for events or support channels. MIT-licensed, born as a fork of Shout, and a fixture of self-hosting stacks since.