Photos!! wow
http://photosm.broadbox.de/?zoom=18&lat=42.209&lon=20.74056&layers=B00

Compare maps :
http://tools.geofabrik.de/mc/?mt0=mapnik&mt1=tah&lon=20.73951&lat=42.20811&zoom=15

Transparent Maps :
http://sautter.com/map/?zoom=14&lat=42.20284&lon=20.75094&layers=B00000TFFFFF

Check map artifacts:
http://tools.geofabrik.de/osmi/?view=geometry&lon=20.74049&lat=42.21369&zoom=13

Rendering @ home
http://www.informationfreeway.org/?lat=42.20831759161674&lon=20.741787870943476&zoom=17&layers=B0000F000F

POI Browser :
http://www.openstreetbrowser.org/?zoom=15&lat=42.20994&lon=20.73786&layers=B000TFFFFFFFTT#

Open Streetbugs :
http://openstreetbugs.schokokeks.org/?lat=42.21234&lon=20.73796&zoom=12&layers=B00T

More Bugs :
http://keepright.ipax.at/report_map.php?zoom=16&42.20831759161674=&lon=20.73966&layers=B00T&ch30=1&ch40=1&ch50=1&ch60=1&ch70=1&ch90=1&ch100=1&ch110=1&ch120=1&ch130=1&ch150=1&ch160=1&ch170=1&ch180=1&ch191=1&ch192=1&ch193=1&ch194=1&ch201=1&ch202=1&ch203=1&ch204=1&ch210=1&ch220=1&ch231=1&ch232=1&ch270=1&show_ign=1&show_tmpign=1&lat=42.20824

Open Street Browser:
http://www.openstreetbrowser.org/?zoom=15&lat=42.20994&lon=20.73786&layers=B000TFFFFFFFTT#

POI Browser:
http://www.lenz-online.de/cgi-bin/osm/osmpoinit.pl?lat=42.20854&lon=20.74032&zoom=17&layers=B000FTF