Chrome //
Extensions 
Chrome
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External Application Launcher
Run any external application with custom arguments from the browser toolbar or context menu to send links, text and more
Show External IP
Detects and shows your current external IP address (as seen by https://showextip.azurewebsites.net/) in a convenient popup.
Show My IP Addresses (External and Local)
This extension shows the external&internal IP addresses when you click the extension icon. https://helloacm.com/what-is-my-ip/
External system integration - Single Sign-On service
This is a service that allows you to automatically log in to various services on behalf of your company in conjunction with…
Gmail External Email Highlighter
For highlighing email addresses in Gmail 'to' fields that don't fit certain rules - ie. that are being sent outside the company.