Archive.md - archive.is allows you to create a copy of a webpage that will always be up even if the original link is down
UI Movement - The best UI design inspiration, daily
Wayback Machine - Browse through over 150 billion web pages archived from 1996 to a few months ago.
Muzli - UI/UX and Design Inspiration Chrome Extension
Perma.cc - Perma.
UI Jar - Hand-picked design inspiration for your real life projects