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Multi Forward for Gmail
Tired of creating reports and forwarding them one by one to your managers or bosses? With multi-forwards, you can forward your email to multiple people at once. And with the ability of BCC and CC options, you can schedule and send multiple emails to different recipients easily.
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Project management Gmail Add-ons

If you’re not project management, these Add-ons can really help you manage your resources, budges and schedule on time with ease.
MeisterTask for Gmail
Now manage your Gmail inbox with the help of MeisterTask, which is a great management tool to manage your tasks along with your emails. You can make and manage your project boards and can share it with other MeisterTask users.
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Todoist for Gmail
Keeping a note of things, you must do in your productive day is important as it keeps a reminder of what needs to be done. With Todolist for Gmail, you can send an email that contains a to-do list of events of tasks to your teammates or employees which saves a lot of time and improves the inbox experience for time and task management.
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File sharing and Signature Add-ons

File sharing is an important part of any business-related email conversation and not to mention the digital signatures. So try out these file sharing and signature Gmail add-ons to improve your inbox experience.
My Signature for Gmail
My signature is not necessary an add-on but an import part of your inbox experience as it helps you to create and manage the digital signatures of your emails. A digital signature is an important part of modern life emails which holds authenticity in law. With My Signature, you can manage your signatures and sign any official documents or emails with your signature easily and effectively.
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Dropbox
Dropbox is a well-known name in terms of file sharing and cloud storage. With the Dropbox add-on for Gmail, users can send files larger than 25MB in size, which is the limit of normal Gmail sharing. With Dropbox, you can share up to 2GB of File. And with direct integration with your Dropbox account, you can share files seamlessly without leaving the Gmail interface.
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DocuSign E-Signature
Apart from email, Document signature is also an important aspect of digital documents. For any electronic cheque, resumes, letters and invoices; it’s important to sign these documents with E-signature.
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Email tracking and Scheduling Add-ons

Marketing is all about tracking and scheduling, so try out these marketing-related Add-ons and improve the way you send thousands of emails to your customers.
GMass
Gmass is the ultimate solution for sending promotional or automated emails to your customers. It can be used by anyone with its simplicity of use design and architecture to run simple email campaigns. With its capability of sending smart, personalized emails, automatic reply and follow management, and tracking analytics, you can enjoy your time while Gmass works for you.
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MailTrack for Gmail
tracking is important, but what if you want a simple to use and robust tracking system which tracks who many times your email is opened and what actions are performed. When working on several marketing campaigns, it is important to analyze the email response to formulate different strategies, and this free Add-on can really become a help in such scenarios.
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Conclusion
As you can see, there are a lot of Gmail Add-ons available to improve your inbox experience and make you more producing and time-efficient than ever. It’s important to use modern tools to make the best out of your time every day. However, I recommend installing only what is absolutely necessary and which suits your working culture. Installing more and more add-ons might slow down your PC, which can result in a bad experience that is opposite to what you want.