Portable Free Apps : Use it And Enjoy it

JkDefrag is a free disk defragmenter and optimizer for Windows 2000/2003/XP/Vista/2008/X64. Completely automatic and very easy to use, fast, low overhead, with several optimization strategies, and can handle floppies, USB disks, memory sticks, and anything else that looks like a disk to Windows. Included are a Windows version, a commandline version (for scheduling by the task scheduler or for use from administrator scripts), a screensaver version, a DLL library (for use from programming languages), versions for Windows X64, and the complete sources.

FCleaner is a freeware all-in-one Windows cleaning and optimization tool. It removes unused files that are eating up your disk space and slowing your system down, tweaks your system and allows your Windows to run faster. FCleaner can also protect your privacy such as Internet History, the Cookies that websites leave behind. You can erase all the traces of your online activities in just one click with the help of FCleaner. NO Experience Or Computer Skills Necessary! FCleaner is free, but it does not contain any Spyware or Adware.

After Windows run a long time, it will be slowly. That’s boring. So if you want to keep your system clean and faseter, you can try CCleaner.
CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it’s fast (normally taking less than a second to run) and contains NO Spyware or Adware!

After Windows run a long time, it will be slowly. That’s boring. So if you want to keep your system clean and faseter, you can try CCleaner.
CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it’s fast (normally taking less than a second to run) and contains NO Spyware or Adware!