https://www.reddit.com/r/AskReddit/comments/7x639l/what_free_software_is_so_good_you_cant_believe/
https://news.ycombinator.com/item?id=16399436
origin - https://www.pipiscrew.com/2018/02/what-free-software-is-so-good-you-cant-believe-its-available-for-free/ what-free-software-is-so-good-you-cant-believe-its-available-for-free