All Piriform's softwares have some common grounds: Free without ads, compact, lightweight, easy-to-use. In addition to the regular installation version, it's officially providing portable version, PortableU3 Edition and Silm-Installer. Currently, Piriform offers 4 excellent softwares for Windows - CCleaner, Recuva, Defraggler, and Speccy.
CCleaner, is Piriform's most well-known system optimization software and it may be the best cleaning tool for Windows. It supports clean up litter, optimize system, delete the files may reveal privacy and various other data, Users can disable start-up programs to speed up computer boot time through it , and so on.
Defraggler, is a defragging tool. Compared to the defragging tool of Windows, this tool is more intelligent, faster, and not like some commercial version of Disk Defragmenter as high price to buy the software. The tool is tiny without redundant functions.
Recuva, is a recovery tool. Accidentally deleted an important file? Lost something important when your computer crashed? No problem! Recuva recovers files deleted from your Windows computer, Recycle Bin, digital camera card, or MP3 player.
Speccy, is a freeware system information tool for personal computers. Speccy lets users view important system information, like CPU Speed, graphics card, Audio information, and more. Besides, It is a good hardware temperature moniter, it could real-time monitor CPU, graphics card and hard disk temperature.