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An avid Slack user? A developer looking for awesome tools to build out an integration? Just looking for inspiration? This is a list of all the best things Slack.

• :pencil: Lists
• :art: Themes
• :hammer_and_wrench: Libraries and SDKs
• :gear: Open-Source Slack Apps and Integrations
• :busts_in_silhouette: Contributions
• :classical_building: License

:pencil:   Lists

• Community-Built Libraries - Slack-curated list of community open-source libraries
• Slack App Directory - Official directory of publicly available Slack apps
• Slack Emojis - Unofficial directory of custom emojis for Slack

:art:   Themes

• Slack Themes - A Slack sidebar theme browser
• Sweet Themes Are Made of These - Website for sharing Slack custom palettes

:hammer_and_wrench:   Libraries and SDKs

C#

• margiebot - A .NET library designed to make building bots for Slack fast, easy, and fun
• Slack.Webhooks - A library to work with Slack webhooks more easily
• SlackAPI - A third-party implementation of Slack's API written in C#

Erlang

• slacker - Erlang Slack REST API wrapper

Go

• webhook - Easily run commands in response to HTTP webhook requests from Slack

Java

• java-slack-sdk - Slack's official Java framework for building Slack apps
• simple-slack-api - A Slack client library in Java

JavaScript/TypeScript

• bolt-js - Slack's official JavaScript framework for building Slack apps
• jsx-slack - Build JSON object for Slack Block Kit surfaces from JSX
• node-slack-sdk - Slack's official SDK for Node.js
• slack-block-builder - Lightweight Node.js library for building Slack Block Kit UIs, with a declarative syntax inspired by SwiftUI

PHP

• SlackBundle - SlackBundle for Symfony2
• slack-php-app-framework - Robust PHP framework for building Slack apps in PHP
• slack-php-block-kit - Fluent interface for composing Slack Block Kit messages and modals in PHP
• slack-php-socket-mode - A Socket Mode implementation for slack-php-app-framework
• slack-php-slick - Dependency-free micro-framework for building Slack apps in PHP

PowerShell

• PSSlack - PowerShell module for simple Slack integration.

Python

• blockkit - A fast way to build Block Kit interfaces in Python
• bolt-python - Slack's official Python framework for building Slack apps
• django-slack - Slack integration for Django, using the templating engine to generate messages
• django-slack-oauth - Slack OAuth module for Django
• python-slack-events-api - Slack Events API adapter for Python
• python-slack-sdk - Slack's official SDK for Python
• slackblocks - Python API for building Slack Block Kit messages
• slack-php-api - PHP Slack client based on the official OpenAPI specification
• slacker-cli - Messages to slack from the command line
• slashbot - An easy way to create slash commands using AWS Lambda functions
• boltworks - Extensions to Slack's bolt framework: expandable GUIs, easier callbacks, richer CLIs

R

• slackr - A package to send webhook API messages to Slack channels/users from R

Ruby

• slack-notifier - A simple wrapper for posting to Slack
• slack-notify - Send notifications to Slack
• slack-poster - Simple gem to post messages on Slack using webhooks
• slack-ruby-block-kit - A ruby wrapper for Slack's Block Kit
• slack-ruby-bot - The easiest way to write a Slack bot in Ruby
• slack-ruby-bot-server - Ruby library for building Slack applications
• slack-ruby-client - A Ruby client for the Slack Web and RealTime Messaging APIs

Rust

• slack-morphism-rust - A modern async Slack API client for Rust

Scala

• slack-scala-client - A Scala Slack client for the Web and RTM API

Swift

• SwiftBlocksUI - Interactive Slack messages and modals using a SwiftUI-like declarative style

:gear:   Open-Source Slack Apps and Integrations

CoffeeScript

• jinora - Slack webhook app to create anonymous public channels

Java

• simple-slack-api - A Slack client library in Java
• tasks-app - Simple task management app produced by Slack

JavaScript/Typescript

• definition-app - App for storing and accessing company-specific phrases
• slack-github-action - Send data into Slack using this GitHub Action
• slack-reporting-tool - App that allows team members to report offensive messages
• tesla-slack - Track your Tesla from Slack
• tasks-app - Simple task management app produced by Slack

PHP

• MantisBT-Slack - MantisBT plugin to send bug updates to Slack
• monolog - Sends your logs to Slack

Python

• slackbot - A chat bot for Slack
• slacker-cli - Messages to slack from the command line
• tasks-app - Simple task management app produced by Slack
• wee-slack - A WeeChat plugin for Slack

Ruby

• slack-gamebot - A game bot for Slack
• snarkov - Sinatra-based Markov bot for Slack
• tickbot - Simple team time tracking reminder
• trebekbot - A Jeopardy! bot for Slack

:busts_in_silhouette:   Contributions

Contributions are always welcome! Please read the contribution guidelines first.

:classical_building:   License

To the extent possible under law, Matias Singers has waived all copyright and related or neighboring rights to this work.