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**OpenDrop** is a fully-featured pendant drop tensiometry software, allowing acquisition, analysis and fitting of pendant drop profiles to obtain surface and interfacial tension. **OpenDrop** now includes functionality for the measurement of contact angles.

It runs on **Python 3.5+**, and uses **GTK+ 3** for the user interface, and **OpenCV** for image analysis.

OpenDrop is released under the **GNU GPL** open source license, and available for free.

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For installation instructions and user guides, visit: https://opendrop.readthedocs.io/en/latest/
