I've written a series of posts on practical "recipes" for how to use Ledger (one of the leading plain text accounting systems) effectively in more complex situations beyond the basic tutorials: https://felixcrux.com/blog/ledger-practices
My mom started a blog about her triathlon experiences after retirement, including being part of Team USA at world championships: https://triathlonatretirement.blogspot.com/
“pass” itself can be used in many contexts, but is primarily a desktop command-line tool. “Password Store” is the Android client for it.