Dev tools · alternatives · 2026
24 alternatives to I built a puzzle / programming challenge with a 0.125 BTC prize
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This is a puzzle and programming challenge launched in 2018 with a 0.125 BTC prize for solvers. It's designed for people interested in cryptography, coding problems, and competitive challenges. The puzzle combines… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. I built a puzzle / programming challenge with a 0.125 BTC prize launched in 2018; newer entries below may have overtaken it.
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Puzzle 2.0▲315Effortless revenue recognition for Stripe customers
2023 · puzzle.io · its alternatives →
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Mobile ZK Puzzle Game with NFT rewards. Contribute to nalinbhardwaj/wordlines development by creating an account on GitHub.
2022 · github.com · its alternatives →
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DEV Challenges▲145Mini-hackathons to build your portfolio and win cash prizes
2024 · dev.to · its alternatives →
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2018 · crapcoin.solutions · its alternatives →
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WebDeveloper.com▲100Earn SATS, the smallest unit of Bitcoin, by unlocking badges
2022 · webdeveloper.com · its alternatives →
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Earn rewards for building games in web2 and web3
2022 · its alternatives →
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60 free animated 3D crypto coins for financial projects
2023 · coins.craftwork.design · its alternatives →
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Hi HN, I'm releasing my round one public demo of a new browser security system I've been developing. There's a real Bitcoin private key (worth $20) in plaintext at app.redactsure.com. You can copy it, paste it, delete it, move it around - full control. But you can't see the actual characters or extract them. The challenge: Break the protection and take the Bitcoin. First person wins, challenge ends. Details: - Requires email verification (prevents abuse, no account needed) - 15 minute time limit per session - Currently US only for the demo (latency) - Verify the Bitcoin is real:…
2025 · app.redactsure.com · its alternatives →
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Very basic blockchain-free cryptocurrency PoC in Python - spipm/crackcoin
2017 · github.com · its alternatives →
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Crypto 101▲126Free Intro course on cryptography available for programmers
2014 · crypto101.io · its alternatives →
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Hey everyone! I am an enthusiast trader and a year ago I had this idea to create a free-to-use website that would feature all the most essential tools that traders would use on a daily basis. So I learned to code and build it—I did everything including design, texts, code, and SEO—which took me 12 months to launch and a year and a half to make it look like it currently does. I was into marketing and design before, but I didn't know barely anything about coding. The website is built using Next.js, Tailwind CSS, and Typescript with Framer Motion animations and lots of APIs. I’m actively…
2023 · tradingdigits.io · its alternatives →
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2021 · mirotomi.com · its alternatives →
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Trade multiple cryptocurrency and forex exchanges through a single interface or over a unified API. Build your trading strategies directly in the browser, backtest against every tick of historical price data and trade live with your broker. It couldn
2014 · cloud9trader.com · its alternatives →
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$17,500 for the best #bitcoin stories
2024 · writingcontests.xyz · its alternatives →
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Hey HN, I built this simple puzzle generator to play around with wasm a bit. It's open source if anyone wants to play around with the code https://github.com/lnenad/puzzlip
2024 · puzzlip.com · its alternatives →
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puzzl.io 2.0▲74Make shareable puzzle with hidden gems to discover when done
2021 · puzzl.io · its alternatives →
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Scan BTC key ranges offline with random or sequential mode
2025 · play.google.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →