I'm using GT S3653, I've downloaded around 1K Java games and didn't find any game that was playable on a touch screen. The only good game is the cricket game that comes with it. I usually don't prefer playing games on a phone so I dint try anymore games.
As for apps. The samsung PC Suite is good(best) for converting HD videos.
For converting wallpapers / merging three into 1 use this software . Or you can insert three 240X320 images into MSpaint and save it as a 720X320 three page image file.
The phone comes preloaded with an RSS reader which I use to read TE's RSS Feeds. There's Palringo which is a good Instant messenger for GPRS users HOTMAIL-GMAIl-YAHOO. I've configured hotmail, gmail to download mails directly in my message-inbox. The inbuilt browser is also good so opera is not required but the latest opera(10 i guess) runs a bit slow. It comes preloaded with dictionary, gmail app., gmaps, google search app., so I don't think there are anymore apps that can actually add a better function unless you mention your requirements.
lolz shame on you guyz no signs of any games on such a big tech forum
where are all experts ??
why don't they answer my question??
it remains unanswered since a month