- Errors in the Map Data
- Quality assurance - Exhaustive list of tools for improving map data quality.
- Notes - Easily add error reports on the OpenStreetMap main website.
- OpenStreetBugs - A website for easily marking errors in the OSM data.
- Mapdust - A QA tool created by Skobbler for easy reporting of issues (bugs) by end users of their OSM-based navigation app. Collected bugs can be reviewed via MapDust.com. If a bug is determined to be caused by OSM data, an OSM editor can fix the data and mark the bug as resolved.
- KeepRight - Shows a large number of automatically detected potential errors in the OpenStreetMap map data.
- MapRoulette - Shows you one error of a specific type at a time, with a new challenge every so often. Links to the editors to fix the errors.
- Bugs in OSM-related Software
The 'tickets' within our trac system are where we track bugs/enhancement ideas in many OSM-related components (the website, and Nominatim, OpenCycleMap, Potlatch, the style of the default map layer) However increasingly components are dealt with separately with issues lists in various github repos. Check the component's wiki page to find the correct place to file a bug if you are unsure.