Theres been a *LOT* of applications developed for BeOS that have never been released. And now their pretty old... so its time to try to get those binaries/source files from the developers!!
This page lists the apps that are "missing"..
Photoshop - was ported. www.adobe.com
Neverwinter Nights - was ported www.bioware.com
Maxon 4D - was ported www.maxon.de
Bryce 3D - finished, never sold
Shogo - never finished due to OGL issues, IIRC
personalStudio 2 - never finished due to Media Kit issues
Steinberg Nuendo - was ported www.steinberg.net
Unreal Tournament - was ported, was www.ngent.com, but they're gone. Find Chris Herborth, ask him.
Quake III - Finished? Unfinished? We may never know... but it was done, at least partially www.id.com
Outcast - Rumoured to have been ported, see above (NGE again)
Internet Explorer - hehe, apparently ported, www.microsoft.com although I guess we don't want it
Right, some news on IE - it wasn't IE at all, but an IE-based browser for the Mac called InstantSpace. It was commercial and was to be ported by a company called Apollo Technologies. They were are www.apolloii.com, once.
Add anything else, format the page right, whatever!!