git clone https://github.com/Marware/photon-screenshot.git
and open photon.pro project file in Qt Creator
Latest working version (Windows installer): https://qreo.net/photon/ there are some links of the by public reviewers on the page
Notes:
- Written in Qt\C++
- Mainly supports Windows, testing on Ubuntu/Linux and macOS back then It worked with some modifications but never published for platforms other than Windows
- The code is messy (one-messy-man project) and has some deprecated code from Qt
- License is Apache License 2.0, please advise if it should be another license
- Online features like OCR and image upload aren't working for now