
Since 2004 the Swiss Army Knife incorporated a USB Flash memory to some of its models with an initial capacity of 128MB. Nowadays the SwissFlash stores up to 32GB and comes with fingerprint authentication, what a gadget! However, you can boost it with this feature packed list of PC repair tools which are as handy as the cruciform Phillips screwdriver. The applications listed in this article are the “Swiss Army Knife” of PC Repair Tools and I'm going to arrange them into categories, however all of them are free to download and install or at least offer a decent free full functional option.
System Optimization
CCleaner
Formerly named Crap Cleaner, takes the first place in this category as it is an incredibly fast and free tool for system optimization and privacy. It allows you to remove all kinds of unused and temporary files which are allocated in your HDDs and thus reducing your system's performance. By freeing up all that disk space, Windows runs smoother, more efficiently, additionally you are going to have more hard disk space at your disposal for more important things. It will clean your Internet browser cache, history, cookies and i
ndex.dat file, recycle bin will go empty, and it will wipe out all temporary and log files, recently opened URLs and files will leave not even traces and many other temp files.

CCleaner also includes an advanced Windows Registry scanner and cleaner which is very handy when it comes to unused and old entries removal. The Windows Startup tool will allow you to eliminate all those undesired programs that make windows boot time longer.
JkDefgrag
What we find in second place is a powerful disk defragmenter and optimizer. At first sight you will realize how fast, easy to use complete and solid it is. As it really works in a totally automatic way and with a very low resources consumption, it is ideal for beginners, but power users will find it very handy as well. In order to cover all optimization aspects, it brings several optimization strategies, and it is able to work in almost any kind of data storage devices provided Windows can read it, in the list we find floppies, USB Flash memories, memory sticks, and many others.

JkDefrag also includes are a version to run directly in Windows and a commandline version which you can scheduled by the task scheduler or you can use it from administrator scripts, a screensaver version, a DLL library for its use from programming languages. This piece of free software is available for Windows 2000/2003/XP/Vista/2008/X64.
DoubleKiller
Our third and last option for System Optimizers is a very simple but powerful freeware whichis able to find duplicate files inside single or multiple directories by making a thorough comparison having in account file name, size, modification date and content. It brings the possibility to make user-defined masks like *.mp3 or *.dll and in this way giving you the ability to focus the scan only to desired files or even protect important data from being scanned and feasible of being erased. Moreover files can also be exclude according to different parameters such as determined file sizes or files attributes (i.e. hidden or system files).

As you can see once the program finishes scanning it shows a list which contains all found duplicates, so, now you are able to the files which you want to erase in a manual or automatic manner. An outcome text file can be obtained as an and you can be read it as well as a spreadsheet application.
What is more important is that DoubleKiller is a portable app, that means it can be executed with out the need of installation, all you have to do is just unpack and run. It is also hazard free as it will not change the system in by no means if you do not give your permission.
Recovery Tools
Recuva
In everyday work most people creates and deletes files and sometimes that deletion is not as conscious as it should be and of course accidents easily happens where you permanently delete important files that were, perhaps, in the wrong folder at the wrong time and were mixed with those to be erased. Fortunately, Recuva helps to restore accidentally (or intentionally) deleted files. But Recuva's abilities do not restrains its work to manually deleted files, it can also recover files that were emptied from the Recycle Bin, from digital camera memory cards or MP3 players not only by careless users but also by bugs, crashes and viruses.

This title is suitable for everyone even advanced user will find it really solid and useful. But what is more surprising to me is the fact that it is totally free even for commercial use.
Restoration
And last but not least, we find this portable yet really solid and powerful file undelete utility. Brian Kato, the author, couldn't have been made it more user-friendly and straight forward, as a matter of fact this tool is able to restore deleted files which were formerly allocated in the recycle bin or even if they were directly deleted under Windows.

Deleted photos from a Flash card (even if it had been formatted), erased mp3 format files from a mp3 player, wiped files and archives from a thumb drive, you just name it, Restoration recovers them all. Once you started the app you are able to perform a filtered scan for all files that you want to be recovered, thus you can limit the outcome by determining a search criteria using a search term or extension. Restoration has the ability to work with FAT and NTFS file systems.
In conclusion
I hope you find this selection interesting and useful, as always you can tell us which are your favourites and why through the comments, I promise to answer every single one of them. By the way, there are many categories to come and quite a lot of applications to review and discover, fortunately freeware apps grow, they are healthy and spreading far and wide in an unstoppable way.