Advanced SystemCare Free | Free Windows XP/Vista/7 Registry Cleaner, Clean Privacy & Speed Up PC
Clean the registry, tweak settings, check for some forms of malware. Good all-round cleanup and tweak tool. Free and advanced payware versions.
Disk Defrag - Reclaim the Speed Of Your Disks
Free for home use. Loads of features and well reviewed. Portable version also available
Posted from Diigo. The rest of my favorite links are here.
