Skype has just discontinued Windows Mobile version of Skype client:
We’ve chosen to withdraw Skype Lite and Skype for Windows Mobile because we want to offer our new customers an improved mobile experience – much like the version that has proved so popular on the iPhone, and which is now available on Symbian phones.
Meanwhile, Adobe was promising to bring Flash 10.1 to Windows Mobile but now Adobe is leaving Windows Mobile 6.x:
As for WinMo, we have made the tough decision to defer support for that platform until WinMo7. This is due to the fact that WinMo6.5 does not support some of the critical APIs that we need.