Chrome //
Extensions 
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Google Chat thread links & quote reply
Adds button to copy links to threads on Google Chat and adds button to messages to quote reply
Gmail - Reply at the TOP
Move the reply/compose box to the top of conversation thread. Allows you to refer the latest response as you compose the reply.
Batch Reply for Gmail™
A chrome extension that makes it possible to reply to all selected conversations in Gmail™ at once.
Quote reply for Chat
Adds button to copy links to threads on Chat and adds button to messages to quote reply
Reply: Email Finder and Outreach
Reply’s Free Email Finder and Outreach searches for emails on professional social media, automates the outreach process.
Microsoft Teams Reply
A Chrome extension adding the reply feature to the web version of Microsoft Teams by quoting the selected text from the context menu
Email Reply Status by cloudHQ
Stop wasting time sorting through emails: Instantly know which of your emails needs a reply back.
Gmail Auto Pop Out Reply Forward Show CC BCC
In Gmail, auto pop out reply, reply all, forward, show CC/BCC/Subject