Awesome

The Pocket Marketing Tech List 🗂

"Introduction to SEO for Developers": A comprehensive overview of SEO.
Screaming Frog SEO Spider: Perfect for running SEO audits, finding status errors, missing alt text, and more. Free for crawling up to 500 pages.
Technical SEO Markeup Generator: Perfect for adding structured data from Schema.org to your site.
WebPageTest: A free site performance measurement tool
Google Search Console: Google's free tool for getting all the pages on your site indexed in Google search. Will also point out possible status errors, high performing search terms, and any performance issues.
Bing Webmaster Tools: Bing's tool for getting your site indexed in Bing search.

Ahrefs: All-in-one SEO tool, from keyword search to site audits.
AnswerThePublic: Tool for finding search terms and questions people ask around a keyword. It's free to search once per day; more than that you'll need to upgrade.
Ubersuggest: Great for finding content ideas around keywords, among other SEO benefits.

Matomo Analytics: Complete Google Analytics replacement that's privacy focused; comes with free trial.
Plausible Analytics: Lightweight privacy-focused analytics solution; free trial available.
Simple Analytics: Privacy-focused analytics solution.
Fathom Analytics: Lightweight privacy-focused analytics solution; free trial available.

"How Blog Post Syndication Works": A post that explains blog syndication, aka "cross-posting".
"What's the best blogging platform for developers?": A blog post to help you figure out what's important in selecting a blog platform.
DEV Community: An open source developer blogging and community platform. Allows you to categorize blog posts into tags, enables comments, and allows for blog syndication.
Hashnode: Developer blogging and community platfor. Allows you to categorize blog posts into tags, enables comments, and allows for blog syndication. Also lets developers map their own domain to their blog.

Canva: Can be used to design flyers, presentations, book covers, and more. Free tier and paid tiers available.
SlidesGo: Beautiful and customizable Google Sheets and PowerPoint templates. Free and premium tiers available.
Compressor.io: Compress images for faster page load speeds.
Flickr: Search for images available under Creative Commons licenses.
Pexels: Free stock images.
Unsplash: Free stock images.

Fiverr: Find everyone from book designers to editors to graphic designers to ghostwriters on Fiverr. I've been working with Fiverr freelancers for sometime with great success. (Note: Affiliate link)
Upwork
Wordy.com: Proofreading and copyediting services.
99designs: Designer marketplace.

Carrd.co: Create a fully responsive landing page with absolute ease. Supports Markdown. Free and paid plans available. (Note: Affiliate link)

Airtable: A powerful no-code relational database. Has a ton of templates for everything from task management to forms to content calendars to Kanban boards. (Note: Affiliate link)
Notion: All-in-one solution for most workflow-related things, like building Wikis, taking notes, tracking tasks and projects, and more.
Obsidian: App for everything from taking notes to building Wikis. Supports Markdown.
Roam Research: App for organizing and connecting different notes and other pieces of information.
Draft: A version control collaboration tool for writers. Supports Markdown.