Given your status of moderator I figured out you might be interested in this. I found this great website with tons of one-liners (openssl, grep,sed, iptables..) so though that might be useful to you. To give you an idea I managed to get a premium account on expers-echange.com by just referring people to this website. I think you guys should share it somewhere on the forum as it would same precious time to everybody.
The website: www.readylines.com
Hope that helps.
Have a nice day.