How to program an arduino without host pc & using arduino as handheld programmer

Hello,

I also found this interesting, easy and opensource

video link :
1 : Intro : BootDrive for Arduino - YouTube
2 : Demo : LCD BootDrive - YouTube

Blog : BootDrive for Arduino | Bald Wisdom

Git hub : Baldwisdom/BootDrive at master · osbock/Baldwisdom · GitHub