With the improvement of resolution, the file size of photo taken by digital camera (or even mobile phone) is bigger and bigger (often several MBs), which gives us the inconvenience to upload to web space or transfer (time-consuming). So many people choose to compress the volume or reduce its size of picture, but most software is at the expense of image quality loss, so that the final effect is difficult to satisfy.

For office environment with no installation of professional PDF editor, if need to edit/modify the PDF document you have to draw support from some format converting tools. The problem is there are so many kinds of such software, but the excellent ones are rare.

With Clonezilla, you can clone/restore the whole disk or some partition of various operation systems (32-bit & 64-bit), such as Windows, Linux, Intel-based Mac OS X, FreeBSD, NetBSD, OpenBSD, Minix, VMWare ESX and so on. What you need is just a bootable CD/DVD or USB flash drive, and then run Clonezilla.

Xenu's Link Sleuth (Xenu for short) is a well received by industry and widely used utility designed for searching and checking the validity of all links on a website or in a file. It may be the smallest but most powerful and very simple to use broken links checker you have seen.

JPEGsnoop is a professional but quite simple to use JPEG image analysis software. It can help you to examine, analyze whether a JPEG image or an Motion JPEG (MJPG) image ever been modified, or rather to detect the authenticity of image.