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