画画类

paint.net  

http://www.dotpdn.com/files/paint.net.4.0.9.install.zip

系统需求安装.net 4.6 

https://www.microsoft.com/zh-CN/download/details.aspx?id=49981

在线实例 

http://www.getpaint.net/redirect/tutorials.html

一些插件 

http://www.getpaint.net/redirect/plugins.html

录制屏幕为GIF动画 

licecap

windows系统 http://www.cockos.com/licecap/licecap126-install.exe  

macox  http://www.cockos.com/licecap/licecap125.dmg

screentogif

 https://screentogif.codeplex.com/downloads/get/1558384

搜狗壁纸

http://dl.bizhi.sogou.com/dl/sogou_wallpaper_2.5j.exe

视频类

音乐类