Free global hackathon where teams use NASA's open data to tackle real-world challenges, with local in-person and fully virtual participation options.
Details: Long-running annual NASA event; the specific page sections retrieved didn't use the word "free" outright, but multiple independent write-ups this cycle describe it explicitly as a free, worldwide hackathon with no entry fee.
Nov 7, 2026 – Nov 8, 2026Major League Hacking (MLH)
Free, beginner-friendly, in-person 24-hour hackathon hosted by RIT's Golisano College of Computing & Information Sciences, part of the MLH collegiate hackathon league.
Details: In-person only, in Rochester, NY. A specific fee wasn't stated on the event page, but MLH-league hackathons are traditionally free for participants (often including meals).
Nov 6, 2026 – Nov 7, 2026HKCERT / Hong Kong Productivity CouncilRegister by Oct 20, 2026
Free jeopardy-style capture-the-flag qualifying round from Hong Kong's CERT, with an Open division alongside student categories; top teams advance to an in-person Hong Kong final.
Details: The event page doesn't state a fee explicitly, but HKCERT's CTF has historically been a free, HKPC-backed community competition. Confirm the Open division's eligibility for non-Hong-Kong participants before committing.
Free virtual hackathon open to students worldwide, run through Devpost with a submission deadline in mid-October.
Details: Open to current students (high school, undergrad, or grad) worldwide, ages 13+. No entry fee is stated on the page, consistent with Devpost's standard no-cost entry model, but it isn't spelled out explicitly. Submission deadline is Oct 10, 12:00pm EST.
Oct 1, 2026 – Oct 7, 2026Devpost (GIS Engineering Club)
Free online hackathon focused on building technology that addresses real-world community and global challenges, organized by the GIS Engineering Club.
Details: Students only (must be above the legal age of majority in their country). No entry fee is listed on the Devpost page, consistent with Devpost's standard no-cost model, but it isn't spelled out explicitly.
Free interactive SQL lessons that run in the browser — short explanations paired with hands-on exercises, from simple SELECT queries through joins and table creation. Good for anyone adding data skills to a resume.
Why I recommend it: Work through the first ten lessons before an analytics interview — it is the fastest way to sound fluent in SQL.
A beginner-inclusive hackathon open to developers designers and innovators of all experience levels worldwide including those with no prior hackathon experience.
Details: No explicit fee statement found on the official page; appears free based on standard hackathon format -- worth a quick double-check before publishing. Winners announced Oct 21.
