The list of Estonia-specific OSM-tools in no particular order:
- https://osm-vs-maaamet.web.app Explanation: Tool for finding missing buildings: OpenStreetMap vs Maa-amet by @dgmapping
- list of missing streets and buildings Missing objects by @SviMik
- buildings without street Missing streets by @SviMik
- rail validator Subway Validator: Estonia by https://organicmaps.app
If you prefer, that something should be added or removed, please write a comment.