Whether for photographers or photography enthusiasts, they will always be disturbed by an endless stream of tourists when capturing landmarks, squares and urban landscapes. Recall that how many times you had to wait patiently in front of some tourist attractions, just in order to take a satisfactory picture without being disturbed by the tourists. If we don't have that much time to wait, didn't wait for that opportunity, or all you have in hands are some photos you had taken at random, then you can still easily remove all the unwanted objects in these photos with the help of some software.

XMPlay is a universal, free and portable music player developed by Un4seen Developments in 1998. It comes with tiny file size (less than 500 KB), compact and clear UI, powerful extensibility (skins, plugins, visuals and other add-ons), support to all popular audio formats, low memory usage, programmable music playback support, drag-and-drop operation support, complete keyboard shortcuts, and more. In short, it can compete with any premium music players, including foobar 2000 and Winamp.

Mind mapping software is a very good thinking management tool, which is pretty practical in organizing work ideas, simplifying work flow, making meeting minutes, performing tasks management, time management, and many other aspects. Nowadays, many companies and individuals start learning and using mind map, because it can help us spread our minds, get our ideas into shape, then improve our work efficiency and simplify the entire work flow.

The M.A.M.E. (Multiple Arcade Machine Emulator) written by Nicola Salmoria and MAME team enables us to play thousands of classic arcade games on our computer. In this way, we can relive the joy and happy memories brought by the classic video games on arcade game console in the past.

Ventilation is an extremely important link related to the safety of mine production. Three-dimensional ventilation simulation system plays a very important role in the safety management of mine ventilation. The ventilation design of new mines, the selection of chief ventilator, and the optimization to the ventilation system of old mines are all inseparable from the accurate calculation of the ventilation network. For the network design of actual mine ventilation, it is often necessary to consider the rationality of the entire ventilation network from many aspects.