Slack App Directory - Your go-to for finding apps that work with Slack
myCompiler - Run your favourite programming languages online
Clerk Chat - SMS for Slack
CodeChef IDE - CodeChef IDE is a free online tool for developers helping them in writing codes and programs.
Cato - Instant Spotlight-like search for your web browser.
Online Python - Online Python is a web application where you write codes in python language in the dedicated text space and the shell output is delivered to you in another text box on the right.