Answer Socrates - Find out what people are asking on Google, for free. This can be used for research, content marketing & SEO. Another free alternative is Answer The Public, but I think Answer Socrates is superior.
Integromat* - Automate the boring & repetitive stuff using this tool that connects between many apps. How do I use this? I send Google Analytics to Slack, send documents uploaded on Slack to a Google Drive folder, back up my email subscriber list and a lot more. Free plan available, with paid plans starting from $9/month. Super affordable compared to Zapier. *aff link
ListenLater.fm - A read-it-later service that turns the articles you send it into a private audio podcast. Listen to articles you don’t have time to read.
Polotno - Free web app to make graphic designs. A hustle-free alternative to canva.com and crello.com. No signups, no ads.