免费的 VNC 软件，多平台支持，移动端支持

SpaceEngine是一个专有软件、3D 天文学程序和游戏引擎，由俄罗斯天文学家和程序员 Vladimir Romanyuk 开发。它使用真正的天体目录和过程生成，​​创建一个代表整个宇宙的三维天文馆。用户可以以任何方向或速度在空间中行进，并且在时间上向前走或向后走。

Mac 平台 Fits 文件预览

GIMP is a cross-platform image editor available for GNU/Linux, macOS, Windows and more operating systems. It is free software, you can change its source code and distribute your changes. Whether you are a graphic designer, photographer, illustrator, or scientist, GIMP provides you with sophisticated tools to get your job done. You can further enhance your productivity with GIMP thanks to many customization options and 3rd party plugins.