Added sclack

README.md

@@ -56,6 +56,7 @@ List of projects that provide terminal user interfaces
 ## <a name="messaging"></a>Messaging
 
 - [Mutt](https://gitlab.com/muttmua/mutt) Email client
+- [sclack](https://github.com/haskellcamargo/sclack) Slack terminal client
 - [Slack-term](https://github.com/erroneousboat/slack-term) Slack client for your terminal
 - [TelegramTUI](https://github.com/bad-day/TelegramTUI) Telegram client
 - [Weechat](https://weechat.org/) Extensible chat client