Free C course called "C Systems Lab"
Ground-up C course for devs who know high-level languages but fear pointers.

PM-focused API course with in-browser sandbox; solves real knowledge gap but crowded educational space.
Product managers, non-technical business teams, junior developers, students in tech/business programs.
Auth0 API Fundamentals · Stripe API documentation · Postman Academy
So we created API101.org, a free course to help product managers and non-technical folks understand APIs, webhooks, authentication, and more. Most of the course is reading and examples, but there are a few mini Postman-style widgets (her idea) scattered in the lessons so you can try real API calls right in your browser.
It’s about 2–3 hours long, fairly comprehensive (maybe a bit much, but everything felt essential), and built as a side project for fun.
We’d love feedback, what’s useful, what’s confusing, what could be improved. Thanks!
Ground-up C course for devs who know high-level languages but fear pointers.
Debugging missions beat Q&A — structured challenges instead of chatting with codebases.
Tactile unit circle finally makes SOHCAHTOA click—but the App Store is crowded with ed apps.
Open-source logic course with GitHub auth, but standard video platforms already cover this.
Builds LangChain's AgentExecutor from 19 to 60 lines without the framework.
Visual knowledge graph navigation beats pure Q&A, but Cursor already exists.