Yes Opera is my most used (tied with media Player) but they COME with the system upgare so I did not include them in with BEST SOFTWARE for Nokia N800... Maemo Mapper is the best 3rd Party Software with Pidgin (for my MSN contacts) a close second. If you only load 1GB of files with Maemo Mapper you should be ok... I got greedy and did the Whole Wide World (Zoom 15-9) and mainly North Amercia (Zoom 15-5) and very detailed locally (Zoom 15-1) and it took up the whole 4GB (minus 200mb for swap and backup).