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Mailbutler - Mailbutler adds lacking functionality to email clients and increases your productivity
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
Boomerang Respondable - Write perfect emails with Artificial Intelligence
Google Sheets - Synchronizing, online-based word processor, part of Google Drive.
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
ChartBlocks - Import data, design and share a chart in minutes. Or seconds via the API.