Slack App Directory - Your go-to for finding apps that work with Slack
Sifter - Sifter is designed to be a simple bug and issue tracker for small teams and works especially great for teams with non-technical folks involved.
Clerk Chat - SMS for Slack
Linear - Streamlined issue tracking for software teams
Cato - Instant Spotlight-like search for your web browser.
Instabug - The top apps in the world rely on Instabug for beta testing, user engagement and crash reporting.