Avast Cleanup and Avira System Speedup finally passed AppNee's software audit rules and were included by us. This post is for Avast Cleanup (next one will be Avira System Speedup) - a new generation of comprehensive PC cleanup, optimization and tuneup tookit released by Avast Software from Czech Republic.

When I hear a song that I like but don't know its name, I think there are only 3 ways to get its name: 1) try to remember or write down part of the lyrics that I can hear clearly, then search it on the Internet (a bit cumbersome and inefficient); 2) walk over and ask somebody what the song's name is (somewhat inconvenient, and probably even the person playing or listening to this music knows nothing about it; 3) use an app like Shazam on a smartphone to intelligently, automatically, quickly and accurately identify almost any music being played anywhere!

PTGui (short for Graphical User Interface for Panorama Tools, or Panorama Tools Graphical User Interface) is a very powerful panoramic photo stitching software for Windows and Mac. It was originally just a GUI front end based on the free and open-source Panorama Tools (AKA: PanoTools), which is the most well-known and multifunctional suite of programs and libraries originally created by a German physics & mathematics professor Helmut Dersch in the University of Applied Sciences Furtwangen.

When shooting video with any mobile phone or all kinds of camera equipment, hand shaking always exists. This directly leads to the inability to ensure the movement of the visual center in a horizontal and straight line when translating the camera. As a result, the video recorded in this way will be dazzling and dizzy. This case, there are only two means to solve this problem: either use a camera with smart anti-shaking feature or use a gyroscope to assist in shooting, or use software for video post-processing.

Gaia Sky is a free, open-source and cross-platform (based on Java) 3D astronomy visualization software developed by ZAH, Universität Heidelberg from Germany. It is designed to map about 1 billion fixed stars in the Milky Way where our planet is located, based on the framework of ESA's Gaia mission, and supports VOTable, FITS, CSV and all formats supported by the STIL library.