Statistics and tools for Estonia: http://osm.svimik.com/

Forum thread (in Russian): http://forum.openstreetmap.org/viewtopic.php?id=11750&action=new

Why you should not use Bing or Maxar in Estonia: http://svimik.com/eeimagery_comparison.html

Short answer: use Esri in iD and Maa-amet in JOSM

Useful Maa-amet WMS layers (URLs for JOSM):

Basemap:

http://kaart.maaamet.ee/wms/kaart?FORMAT=image/png&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=MA-KAART&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}

Addresses:

http://kaart.maaamet.ee/wms/aadressid?FORMAT=image/png&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=ads_hoone,ads_hoone_aadr,ads_cu_aadr,ads_ky&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}

Aerial imagery:

http://kaart.maaamet.ee/wms/fotokaart?FORMAT=image/jpeg&VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&LAYERS=EESTIFOTO&STYLES=&SRS={proj}&WIDTH={width}&HEIGHT={height}&BBOX={bbox}

Make sure to switch projection to EPSG:3301!