MKV (Matroska Multimedia Container) is an increasingly popular video format. In some cases we need to extract the resources from MKV video so as to obtain the video, audio and subtitles inside separately for other use. For example, make an audio version of a film/TV play; edit, modify, or translate the subtitles (and then use MKVToolNix to repack them all). At this time, we can use MKVExtractGUI this tiny app to solve the requirement perfectly.

Nowadays a lot of people are keen to make presentations on computer to express their ideas. For example: teacher uses PPT and Flash to make courseware, financial staff uses it to show reports, designer demonstrates conception, and so forth. But presentation based on slideshow is missing the interaction and convenience of the traditional blackboard/whiteboard, which leads to such a bad result that both lecturers and audiences can only passively march forward following the scheduled architecture. This seems to be efficient, but is actually not as free and flexible as "a piece of paper + a pen".

RapidTyping is a freeware used to train, strengthen your keyboard typing skill. It comes with friendly, intuitive and beautiful UI & color scheme, supports for multiple languages and multiple users, and provides typing analysis and statistical functions to report and track the progress of students, as well as interesting typing games for young kids to learn typing.

A few days before I wrote this post, my laptop keyboard had at least 9 keys broken due to water splashing. In the meantime, I first used the Keyboard Map Tool to temporarily modify the key mapping of those broken keys in order to continue to use this keyboard constrainedly. Afterwards, I found this Keyboard Test Utility, which helped me determine all the broken keys. In the end, I also use it to test the validity of all keys on my newly-bought USB external keyboard.

Total Commander (TC for short) is written in Delphi by Christian Ghisler from Switzerland. It's originally called Windows Commander, but because Microsoft always says "Windows" was theirs (in 2002), it had to change to use its current name. The reason AppNee did not recommend this edge tool before is that we thought it is more suitable for advanced computer users (lets them ice on the cake), not a beginner at all (so daunting that makes most users feel confused and uninstall it immediately).