Osmapy is an OpenStreetMap editor programmed in Python. Python is modern, has a huge user base and is battery-included. This allows everyone to contribute to this project. Osmapy uses the widespread, powerful and freshly-looking Qt-framework.
Cost / License
- Free
- Open Source (GPL-3.0)
Platforms
- Mac
- Windows
- Linux
Best alternatives are 
StreetCompleteand
JOSM
12 alternativesStreetCompleteandJOSM