Here are some cool/useful chrome extensions i came across
Email Tracker: This extension will tell if an email was read by the receiver
Honey: This extension will automatically find coupons for you all major websites supported
Image downloader: this extension allows you to download any image from a website in a few different formats
APK Combo Downloader: this extension allows you to download any playstore app just copy the link and paste
let me know if you guys come across other cool extensions
(Also let me know if this topic was to off topic for this platform)