Alternatives
Products that do what Lost Ethereum does
Hi guys, I've written the first proof-of-mistake crypto token on top of Ethereum. You can see it at http://www.lostethereum.com/ It's basically a proof-of-burn substitute for users who mistakenly sent to the wrong address. It requires a web3 enabled browser, i.e chome with MetaMask, Parity, Mist, etc. This let's the web interface seamlessly interact with the Ethereum network. Let me know what you guys think.
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- 2CP
2018 · cryptoproof.org
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- 62D
I founded the first blockchain certificate of deposit. I'm surprised that it became so popular so fast, I hope it doesn't cryptokitties the network. The marketing looks like a scam. Code (audited 2x): https://etherscan.io/address/0x2b591e99afe9f32eaa6214f7b7629768c40eeb39#code Ethereum top list: https://etherscan.io/topstat#Transaction I'm always available at http://t.me/RichardHeart
2019
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- 8AS
Hi HN, I'm the creator of epress. After a lot of work, I'm excited (and a bit nervous) to finally share it with you. For years, I've been feeling like a digital tenant on the platforms I use every day. My content, my social graph, my online identity—they were all stored on someone else's servers, subject to their rules, algorithms, and business models. I could be de-platformed, my data could be sold, or an API I relied on could suddenly be put behind a paywall. I looked into existing decentralized alternatives. While many are great projects, I found they often shifted the trust from a big…
Sep 2025 · github.com
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2017 · cryptominded.com
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I know everyone is a bit burned out on blockchain and cryptocurrency related stuff around these parts, but I've been working on as a side project for the last few months and thought you guys might be interested: https://cryptoempire.io/ It's still a bit buggy and incomplete (the mobile ux needs a lot of work, the leaderboard isn't functional yet, etc.), but I've reached a point where I'm not totally ashamed of sharing it :) Any feedback would be most welcome!
2018
- 11CC
I built this site to make it really easy to put cryptocurrency in the hands of people who know nothing about it. It's an MVP, and I have a laundry list of enhancements/feature requests/things I want to do. Still, any non-obvious feedback is welcome. https://cointipping.com
2014
- 12IA
So I made this: http://userscripts.org/scripts/show/185221 Feel free to use/adapt/modify as you please.
2013
- 13FW
Hi HN! I recently open-sourced a project I’ve been working on over my winter break: a Solidity web framework you can use to write web apps in Solidity (and more generally, a proof-of-concept implementation of an arbitrary network protocol over Ethereum). Here’s a demo web app on the Optimism Goerli testnet: http://simple.fallback.natecation.xyz/ Running this Solidity code: https://github.com/nathanhleung/fallback/blob/main/src/examp... There’s a lightweight TCP server script that’s listening on the demo app domain that forwards requests…
2022 · github.com
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Like in the movies when they show a current newspaper, but easier and safer. I use as seed the last mined ethereum block, and I show it in a fancy way.
2023 · timeevidence.com
- 15RW
hey folks! My book Real-World Cryptography was just released and is now shipping. I've been working on this thing for the last two years and a half, and the goal was to give a good overview of everything that can be classified as "real-world" about crypto. You'll find all the basics in the first half of the book, and the second half contains chapters on TLS, noise, PAKEs, post-quantum cryptography, zero-knowledge proofs, MPC, cryptocurrencies, FHE, etc. So it's a good pick if you're learning, but also if you've been in the field for a while and want an intro to some subfield you're…
2021
- 16EP
Hi guys, I am building Ethercup and I wanted to show you how it works: https://ethercup.github.io/ . On the website is a demo bet live right now on the Kovan test network. This bet opens today and will close in a few days. A How-to is provided on the website, but you can check out the code directly on GitHub: https://github.com/ethercup/ethercup.github.io There's no bug-bounty program, but I'm willing to share profits (if it'll yield any) in case you can break it and point me to it. Looking forward to hearing your feedback :) Also, feel free to ask…
2018
- 17EB
Hi guys, It is no secret that I'm pretty tired of the political infighting around Bitcoin. The environment got so toxic that I stopped most of my Bitcoin-centric development to focus on other projects. I'm pretty sure there are many developers who have felt the same way, and the result has been an explosion in alternative coins and technologies as developer resources have gone elsewhere. So, I started a simple experiment. What if we got rid of developers entirely, and just replicated and adapted the deflationary structure of Bitcoin on Ethereum. We could model the entire process as an…
2017
- 18DM
In light of the recent Ledger database breach (https://cointelegraph.com/news/ledger-users-threaten-legal-action-after-hacker-dumps-personal-data), I wanted to see if my address had been leaked after purchasing a Ledger Nano S for myself. HaveIBeenPwned unfortunately doesn't show if just your email or your email as well as address has been leaked, so I decided to set this up. I wish Ledger would just set this up for their customers, but apparently that is far too difficult for them. So here you all go, I wish you the best :/ https://www.didledgerfuck.me/
2020
- 19CS
Hi HN! Token cost has started to become a high topic of concern to all of us. I tried a few (awesome) tools such as rtk, caveman, and the recent (hillarious but effective) ponytail. What they usually do, is in-line token reduction, e.g. try to compress requests / responses as much as possible. But then it hit me (and I’m sure others had similar ideas) - just like we have routers that pick the right model, why not have something that will also narrow down the amount of available tools, skills and mcps based on repo/context? People usually accumulate skills, agents, MCP servers,…
Jun 2026 · github.com
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Hey HN! I've been working on this idea off and on for a few weeks now and I figured it was time to show it to folks before continuing to build it out any further (hence the terrible UI). The idea is this: A smart contract that allows players to win the tokens in the contract in proportion to the number of tokens they've depositing into the smart contract. For example, if you and another player enter a round with 1 token each, you both have a 50/50 shot of winning the other's token. Here's the catch. Anyone can end the round at any moment, even people who haven't deposited any tokens.…
2021
- 21EA
Hi All! I wanted to show you guys EmailUSD, an app I’ve been working on for some time. It lets you send and receive TRON USDT using just email addresses simplifying onboarding and making it super easy to use + send and receive. I think for a lot of non crypto folks crypto is this scary new thing because the onboarding and usage experience is really novel. Upon introduction you have to write down your 12 words and we put scary messages everywhere about it. And then when you want to send and receive you have to transmit this complex combination of numbers and letters to someone and get it…
2024 · emailusd.net
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2018 · decentralizedposts.com
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Hi, I'm Robert Karl, a software engineer, cryptocurrency trader, and creator of CBR ( https://CostBasis.Report/ ). I wanted to report gains from trading to tax authorities, but found existing crypto-tax solutions were not great. There are some very fully featured tax solutions out there. I believe there is even a YC company that can solve this problem. However, I found that for my use case, which includes less than 100 trades, the existing sites would charge me between $150 and $800 for a handful of PDFs. I wasn't sure that made sense given the server-side costs to generate…
2019
- 24IB
I built this as a Garage Project over the weekend. https://x402.backpac.xyz/ Still working on refining things, but let me know your thoughts. Cheers.
Sep 2025
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