Color Management : Color Manager GNOME session is a framework that makes it easy to handle, install and create color profiles in the GNOME desktop
Easier Debugging Python : The gdb debugger has been extended so that it can communicate detailed information about the inner workings of Python 2 and Python 3 runtimes
3D Support: In Fedora 12 experimental support for 3D through-mesa-dri package-experimental drivers for ATI cards became available and has been expanded in Fedora 13 to support the systems through Nouveau Nvidia Driver.
PulseAudio Integration KDE : Fedora 13 offers a better integration of PulseAudio in Phonon KDE and KMix
Bluetooth DUN NetworkManager: NetworkManager now supports easy-to-use Bluetooth Dial-Up Networking (DUN) support.
Include include Gnome 2.30.
Mobile NetworkManager Status : The NetworkManager applet shows the current signal strength, technology (GPRS / EDGE / UMTS / HSPA or 1x/EVDO etc), and roaming status while connected to the cards which support this functionality.
Fedora 13 SC have KDE 4.4, GNOME 2.30, support NFSv4, RPM 4.8, support both Python 3 and Python 2.x, OpenOffice.org 3.2.0, the Sugar desktop 0.88 (famous for its integration into the XO laptop One Laptop Per Child project), Firefox 3.6.2, and Upstart 0.6.0.