@barney
As DJBase and Tension indicated, OS4depot and aminet are great places to look for software. There are several programs under development. As far as I know, there is no official Office Suite available yet. Many old 68K programs also work fine with OS4.1, as long as they were written in a system friendly way and do not try to access the classic Amiga chipset or features that are only present in an older version of AmigaOS. Some people have more success than others.
I have used the following programs with OS4.0 and OS4.1 on my MicroA1. Not sure if they all work on the Sam440, but at least it is a place to start. I had some problems with interaction between AWeb and TuneNet, so I don't have TuneNet installed right now. TuneNet was a really great music player and internet radio program. Not sure if it is still in development.
Here are two word processors, one is in development, the other is not:
Cinnamon Writer, Final Writer 97
There are many editor programs, including NotePad which comes with OS4.1.
Here are some web browsers:
Origyn Web Browser (aka OWB), NetSurf, AWeb, IBrowse
Here are some email programs:
YAM, SimpleMail
Here is an IRC chat program:
WookieChat
Various music, audio, image, video viewers:
TuneNet, AmigaAMP, MuliView, WarpView, DvPlayer, AmiPDF
Some paint programs:
PPaint, TVPaint, Real3D
Some other programs:
KingCON, MicroRexx, AWNPipe
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redfox