Learning and career

Resume and cover letter builder that keeps versions organized and checks ATS readability.

Practice exams for the AWS Cloud Practitioner certification with timed mocks and spaced repetition.

• Open source

AI tutor that teaches coding using your own repository without writing the code for you.

• No card

Online university courses from Harvard, MIT and others, strong in computer science.

Coding exercises in dozens of languages with feedback from volunteer mentors.

• Open source

Resume builder with AI help, template conversion, PDF export and a job application tracker.

Published lecture notes, assignments and videos from thousands of MIT courses.

Browser-simulated terminal for practicing Linux shell, Git and Vim.

Java IDE for beginners with a visual class view, used widely in teaching.

Cisco courses tied to certifications in networking, cybersecurity and Python.

Clinical reference assistant with medication interaction checks, diagnosis codes and summaries.

• Students

Short hands-on courses on generative AI tools, most finished in about an hour.

Self-paced study material for the Cisco CCIE Automation (DevNet Expert) exam, incl. Click and Flask-RESTx.

DevOps tutorials, cheat sheets and interview prep, plus small tools like a Dockerfile linter.

Django tutorials for newcomers to web frameworks, plus articles written by readers.

Gallery of LaTeX resume templates to copy and edit in the Overleaf editor.

Nonprofit coding curriculum with certifications in web development, data and security.

• Open source

University of Helsinki course on full-stack JavaScript: React, Node.js, GraphQL and TypeScript.

Interactive lessons covering HTML, CSS, JavaScript and SQL, from basics upward.

In-browser lab environments for practising Linux, Kubernetes, containers, DevOps and networking.

Job hunt organiser for logging applications, interviews, opportunities and contacts, with a Chrome extension.

Hands-on labs and projects for Linux, DevOps, security, programming and data science.

Coding interview rooms with video chat, a whiteboard and an in-browser compiler.

Resume builder with many templates, PDF and DOCX export and optional public links.

• Open source

Step-by-step learning paths for developer roles and technologies.

Snippet playground for many languages, with beginner and intermediate courses alongside.

• No sign-up

Browser SQL playground with a JOIN visualiser, formatter, CSV/JSON converters and practice questions.

• No card
• No sign-up

Web development curriculum centered on JavaScript and Ruby, with projects.

• Open source

Reference pages and tutorials for HTML, CSS, JavaScript and other web technologies.