Cold Turkey - Cold Turkey is a free productivity program that you can use to temporarily block distractions so that you can get your work done!
Now UI Kit - A beautiful Bootstrap 4 UI kit. Yours free.
Freedom.to - Freedom is a productivity hack that lets you block apps, websites or the entire Internet on iPhones, iPads, Windows and Mac computers.
Bots UI Kit - Fully customizable Sketch UI Kit for Messenger Platform
Stay Focused - More suitable with Google Chrome, this service enables you ensure you do not waste precious time on updating Facebook status or chatting with people.
Landing UI Kit - Handcrafted UI components for landing pages