EtherCalc
Open SourceEtherCalc is a free and open-source web-based spreadsheet application designed for real-time collaborative editing. It allows multiple users to simultaneously view and edit the same spreadsheet directly in a web browser without requiring any software installation, making it ideal for collaborative data entry and basic calculations.
Key Features
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Excellent real-time collaborative editing.
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No software installation or account required for basic use.
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Simple and easy to learn interface.