Kali Linux (successor of BackTrack Linux) is a free and open-source Debian-based Linux distribution funded and maintained by Offensive Security from Switzerland. Users can boot and use this OS via hard disk, live CD or live USB anytime and anywhere. Almost all open-source tools used for digital forensics, penetration testing, ethical hacking and network security assessments are included. There is no need to prepare and maintain this Linux distribution (including gathering all those software and their dependencies) by yourself, or to install any software and save any files on Kali.

Wise Care 365 (its predecessor is Wise PC Engineer) is an all-in-one type of free product of WiseCleaner that integrates the main functions of WiseCleaner's many popular products (mainly Wise Registry Cleaner, Wise Disk Cleaner and Wise System Monitor) in one place. In other words, the essence of Wise Care 365 is a toolbox that brings WiseCleaner's previously released series of system optimization & cleanup tools together, and adds some advanced features. So, the functions Wise Care 365 covers are comprehensive enough.

When handling a lot of Word documents in daily work, how to quickly and efficiently accomplish its mission? Even if for a proficient in Word document processing, it will be helpless to delete all blank lines with one click, delete all pictures with one key, delete blank rows in a table and many other time-consuming, tedious and repetitive operations - you just can't guarantee the work efficiency and quality. This case, a small and simple set of plug-ins - Kutools for Word can be your best choice.

Advanced Host Monitor (AKA: KS-HostMonitor) is a highly extensible network monitoring toolset that enjoys a high reputation in the field of network management. It was developed by KS-Soft from Germany for small and enterprise-class networks or hosts.

MKVToolNix (AKA: Matroska Toolkit) is a free, open-source and cross-platform collection of tools primarily used to perform merging, splitting, encapsulating, extracting operations to MKV format of videos, audio tracks, and subtitles.