Wayback Machine - Browse through over 150 billion web pages archived from 1996 to a few months ago.
Time Zone Converter - Time Zone Converter is an online productivity tool to calculate exact time across time zones.
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
Time Travel - Prebook rides for Uber
TimeLord for Slack - Timezone converter bot for Slack
FreezePage - FreezePage is a free service for taking online snapshots of web pages.