Saving SSH keys in macOS Sierra keychain
How to fix Sierra not remembering SSH keys.
As described in detail on https://openradar.appspot.com/27348363, macOS/OS X till Yosemite used to remember SSH keys added by command ssh-add -K .
Unfortunately this way no longer works and command ssh-add -K in macOS Sierra no longer saves SSH keys in OS's keychain. As Apple Developer stated: "That’s expected. We re-aligned our behavior with the mainstream OpenSSH in this area."
SelfControl
SelfControl is a free and open-source application for Mac OS X (10.5 or above) that lets you block your own access to distracting websites, your mail servers, or anything else on the Internet. Just set a period of time to block for, add sites to your blacklist, and click "Start." Until that timer expires, you will be unable to access those sites--even if you restart your computer or delete the application.
LastHistory: Visualizing Last.fm Listening Histories and Personal Streams
‘LastHistory allows you to analyze music listening histories from Last.fm through an interactive visualization and to explore your own past by combining the music you listened to with your own photos and calendar entries.’