Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

bridge between mattermost, IRC, gitter, xmpp, slack, discord, telegram, rocketchat, twitch, ssh-chat, zulip, whatsapp, keybase, matrix, microsoft teams, nextcloud, mumble, vk and more with REST API (mattermost not required!)

Open-source live customer chat

some personally made dockerfile

Mattermost Desktop application for Windows, Mac and Linux

A feature-rich Unix terminal client for the Mattermost chat system

Deprecated

Save or export your private and public Slack messages, threads, files, and users locally without admin privileges.

PingMe is a CLI which provides the ability to send messages or alerts to multiple messaging platforms & email.

Push notification SDK(Bark、Chanify、DingTalk、Discord、Gitter、GoogleChat、IGot、Lark、Mattermost、MicrosoftTeams、NowPush、Ntfy、Push、Pushback、PushBullet、PushDeer、Pushover、PushPlus、QQ、RocketChat、ServerChan、ShowdocPush、Slack、Telegram、WeWork、XiZhi、YiFengChuanHua、Zulip).

Connect to your mattermost or slack using your IRC-client of choice.

Create polls and surveys directly within Mattermost

A python-based chatbot for Mattermost (http://www.mattermost.org).

A Mattermost plugin for communicating daily standups across teams

😈 An extensible chat bot framework. sactive-bot is an evolution of the open source hubot project. - https://www.shipengqi.top/sactive-bot .

Redux for Mattermost

Hubot adapter for Mattermost using Web API and Websockets

Jitsi plugin for Mattermost 🔌

a mattermost plugin that sets reminders for users and channels.

Messenger plugin for Redmine with Slack, Discord, Rocket.Chat and Mattermost support