Disasteroids 3D is a nice simple small OpenGL game that runs well under ReactOS, even using the slow software OpenGL rendering.
Skulltag
A slightly older version of Skulltag works great (software rendering
mode). The current version only displays a solid black window due to some
drawing issue.
Tux Racer
Tux Racer runs very nicely. Cool.
VLC
Enough with the games, VLC 0.8.6, a video player, seems to run fairly
well although there is currently no sound.
Office 97 Install
Everybody wants Microsoft Office, so here it is. Although the world
would be better served with a true clone of Microsoft Office if the point
is to get away from Microsoft Products.
The Office 97 installer seems to work fairly well even though there is a 16-bit setup stub that has to be bypassed.
Powerpoint 97
Powerpoint 97 now seems to somewhat work.
Access 97
Access 97 kind of sort of runs, but it is a mine field trying to do
anything with it. Don't try this one at home.
Excel 97
Microsoft Excel and Microsoft Word both just briefly start up before
causing ReactOS to BSOD.