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

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

Mattermost Desktop application for Windows, Mac and Linux

some personally made dockerfile

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

Deprecated

PingMe - A unified CLI and web service for sending notifications across multiple messaging platforms

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

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

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

Create polls and surveys directly within Mattermost

Jitsi plugin for Mattermost :electric_plug:

A Mattermost plugin for communicating daily standups across teams

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

Mattermost Agents plugin supporting multiple LLMs

Mattermost Helm charts for Kubernetes

Hubot adapter for Mattermost using Web API and Websockets

Redux for Mattermost

a mattermost plugin that sets reminders for users and channels.

GitHub plugin for Mattermost

Open source stack for applying AI to workflows in secure environments

A remote CLI tool for Mattermost

Build scripts and templates for writing Mattermost plugins.

GitLab plugin for Mattermost

Email Integration for Mattermost

Automatically rewrite text matching a regular expression into a markdown link.

Mattermost Operator for Kubernetes

Ansible playbook to provide a turnkey solution for the Team Edition of Mattermost