PEiD (short for PE iDentifier) is a well-known professional packer/cryptor/compiler detecting tool. It's so powerful that it can detect the types/signatures of almost any PE file packing tools (at present, the number has been more than 600 kinds). In addition to the official version, AppNee also provides you its full-plugin version, which can be treated as the most perfect one version (contains 60+ plugins and necessary runtime library files: mfc70.dll, msvcr70.dll, rtl70.bpl, vcl70.bpl) on the Internet at present. I do believe reverse engineers or software cracking/unpacking enthusiasts must like it very much.

DjVu is a hierarchical image compression technology for distributing documents and images with ultra high compression ratio. Under the same quality level, it has only about 1/10 file size of PDF. It was developed by AT&T Labs in 1996 and enables the high-quality scanned images of almost any traditional printed materials to be transferred through Internet at a very high speed.

WebBrowserPassView is a tiny freeware made by Nir Sofer, used to view almost any account information (URL, account and password) of any websites stored in all major browsers. Certainly, passwords for e-currency payment such as these with complex encryption can not be viewed here, they are unreadable code at most.

If you are a fonts collector, and your Fonts folder has become very swollen, then looking for some appropriate font will take up most of the time for text editing or designing. So how to save this time?

PSD (Photoshop Document), AI (Adobe Illustrator), EPS (Encapsulated PostScript) are all the graphics file formats created by Adobe Systems company, used for Adobe Photoshop and Adobe Illustrator. They store layers, channels, reference lines, annotations, color modes and other information added by Photoshop/Illustrator. Although, we can also use ACDSee such as this universal image viewer, that way is not fast and convenient enough.