I beleive the next big thing online will be live streaming.
Stream Labs is a streaming platform for Twitch, YouTube, & Facebook. The app is excellent, and while it's geared for gamers, it can be used for live streaming in general. https://streamlabs.com/
Free and open source software for video recording and live streaming. https://obsproject.com/
Clean up your inbox.
Unroll Me lets you see a list of all your subscription emails for easy reviewing, or to unsubscribe easily from the ones you don’t want. They also have what they call Rollup, which collates your subscriptions for you in a handy daily digest. https://unroll.me/
Tools to help with daily SEO tasks by analyzing your own web pages, as well as your competitors.
SEO Minion helps you with SEO tasks such as On-Page SEO analysis, Broken Link Checking, Hreflang tag checking, SERP Preview and more.
Keywords Everywhere is a browser add-o n for Chrome & Firefox that shows search volume, CPC & competition on multiple websites.
Uber Suggest is a keyword and SEO research tool, and a pretty one for doing basic keyword research. But it's no longer free, and not worth using without unlocking the core features.