Stuff like Skype and random MMORPGs(that work for windows 7 and never glitched during my use of the beta of 7) I have installed didn't show up in the list, the games thankfully had an uninstall program in its folder but Skype doesn't.
I noticed this before and it hasn't been a major inconvenience but now that I have to uninstall Skype so I can downgrade it, it's really annoying. Some programs installed do not show up in Programs and Features, which makes me manually go to their folder and use their uninstall if they have...