Sometimes because of work or other things we may need to convert the regular CSV (Comma Separated Value) format of files into Excel or other proprietary formats. In this case, I recommend you a very handy, powerful and popular CSV file editing/modifying application CSV Buddy, which is specially developed for processing large CSV files in batch.

Jitsi (AKA: Jitsi Desktop, formerly called SIP Communicator) is a powerful, scalable, secure (using the SIP/RTP/SRTP/ZRTP encryption algorithms), high-quality and community-driven VoIP/video conferencing/instant messaging application from France, written in Java. It's free, open-source, cross-platform (across Windows, Linux, Mac OS X desktop platfroms and Andrjoid, iOS mobile devices), multi-protocol and multi-user on use and allows to be made secondary development.

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.

Panorama (full name Easypano Panorama) gives us an immersive and realistic feeling, hence this technique is primarily used for exhibiting house buildings, scenic spots, hotels, campus landscape, and many other scenes. In real life, however, the viewing angle of photographs taken by the traditional camera is very limited. This case, to make a complete and perfect panorama, a professional image stitching software is indispensable.

Prezi is a famous and popular cross-platform (Windows, Mac, iPhone, iPad, Web, etc.) presentation solution from Hungary. It can create and edit PPT file with animation, zooming and more interaction effects in the form of storyboard, and is considered to be one more creative, engaging, persuasive, and effective alternative of Microsoft PowerPoint - getting rid of the latter's limitations on the expression of ideas.