Plain-text passwords
Once of the easiest ways *not*
to leak out somebody's password is to not store it.
This is a common practice where only a value that can validate your password is stored. This value, often called a "hash" cannot be reversed in order to learn the original password.
For quite awhile now, I've been trying to track down a decent editor for Perl code was multi-platform or would at least run in Linux.
After having looked around quite a bit, my co-worker tweaked me to the FOSS "Komodo Edit" package.