Universe Sandbox is a very cool software designed to simulate the physical interaction movements (you can create & destroy on an unimaginable scale) of universe stars perfectly. It has a 3D engine with very high simulation degree, and is a pretty darned good simulator (also can be regarded as a scientific game) for understanding the whole universe.

eBook Edit Pro is an old but classic, perfect eBook creator used to pack the HTML page files (including media files) into an EXE (executable) electronic document. It has been gone from the Internet for a long time, here, we posted it just for minority users who need it.

U.S. Air Force Pocket Survival Handbook: The Portable and Essential Guide to Staying Alive is originally designed for the U.S. Air Force formal training, but it can also provides comprehensive and detailed outdoor survival skills for ordinary readers.

Now more and more people choose Chrome, but the backup of Chrome's default configurations is really troublesome. It will be really cool if there is an automation tool to do this for us. So, Google Chrome Backup stands out from the crowd.

PDF SpeedUp is a lightweight optimizer utility mainly used to speed up the startup speed and running speed when opening or editing the PDF files for Adobe Acrobat and Adobe Reader.