ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Quip: Team Documents for Slack - Create, share and get notified about Quip docs in Slack
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Trainual + Slack Integration - Capture knowledge or access training right inside Slack
n8n.io - Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.
Papermind - Papermind Slack App is a collaborative article-editing and document management platform for Slack