I use something very simple: A TXT file. It can be opened with almost every
text editor, of not with all.
I usually keep temporary notes inside a file containing pending stuff like
contacts to be added, emails to be sent, medias to check out, software to
check out, or other computer-related things to be made.
For my mostly consistent notes, I have a TXT file for each type, like
cultural events/conventions, favorite sites, favorite free softwares,
favorite free cultural works, non-free cultural works to check, hate (because
I've already checked them), or like.
As for the contacts, if I were to say something about it, I would probably
destroy the storage device first and start everything again. :D
Best regards, ADFENO.
Have a nice day.