Dev tools · alternatives · 2026
24 alternatives to Walk-through of rocket landing optimization paper [pdf]
Hey all! Long time lurker, first time poster. I found this rocket landing trajectory optimization paper cool, but it took me a while to wrap my head around it and implement it. I wrote up an expanded version of the paper including details that would have helped me understand it the first time through, with the idea being that it might make the content more approachable for others with similar interests. The source code is also linked in the document. I'm open to feedback, I'm always trying to get better across the board.
This is an expanded explanation of a rocket landing trajectory optimization paper designed to make the complex content more accessible to engineers and enthusiasts. The creator added detailed explanations and… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
I got pretty good at (and very addicted to) the lunar lander game from a few days ago... so I decided to make an autopilot for the lander based on what I felt like was the best strategy! Now I can have perfect landings every time without lifting a finger :D Writing the autopilot code was a lot more fun than I expected! It felt a bit like programming a robot. Source code: https://github.com/szhu/lunar-lander-autopilot Original lander HN post: https://news.ycombinator.com/item?id=35032506
2023 · szhu.github.io · its alternatives →
- 2
I am excited to announce the launch of my e-book on Graphics/WebGPU programming! This project has consumed much of my spare time, during which I developed various tools to facilitate the publishing process, including a code playground and a static site generator that can reference sample codes. However, I'm feeling burnt out and ready to call it finished, even though it may not feel completely done. Avoiding another abandoned side project has been my primary motivation in reaching this point.
2024 · shi-yan.github.io · its alternatives →
- 3IW
The book page links to a blog post that explains how I got about it (and has a link to sample content), but the TL&DR is that I could not find a lot of books that were on "our" history _and_ were larded with technical details. So I set about writing one, and some five years later I'm happy to share the result. I think it's one of the few "computer history" books that has tons of code, but correct me if I'm wrong (I wrote this both to tell a story and to learn :-)). My favorite languages are Smalltalk and Lisp, but as an Emacs user, I've been using the latter for much longer and for my…
Feb 2026 · berksoft.ca · its alternatives →
- 4
I (17y/o) have been developing a rocket launch simulation that allows the user to explore what it's like launching a rocket from earth and putting it into orbit. This idea originally started as an educational simulation but as i've gone more down the rabbit hole the more i've wanted to make it realistic. The problem is that I've never had a formal orbital mechanics class or anything like that so I don't know what I'm missing, what I currently have implemented is: Variable gravity Variable Atmospheric drag (US Standard Atmosphere 1976) Multi-stage rockets Closed-loop guidance /…
Jan 2026 · donutthejedi.com · its alternatives →
- 5
Hey HN, I just wanted to share that after five months of intense work and countless caffeine-fueled writing sessions, "Master Software Architecture: A Pragmatic Guide" is now available. Writing this book was a crazy time. I entirely focused on it, and it took exactly 753 hours of writing, editing, and image editing & resizing(!) until the premiere. Yes, the last one (images) was a killer. If you ever think about writing a book, reserve a lot of time for it unless someone else does it for you. As a result, I am handing you the nearly 400-page book. It is a guide that will help you connect all…
2024 · leanpub.com · its alternatives →
- 6
Hi, I'm Will. I'm 24, autistic, and have OCD tendencies. I'm learning to code and this is my first public project. I’d really appreciate your feedback and encouragement! This project lets me solve some of my OCD problems online. There are a couple of parts of the forums that I visit – Space Battles, Sufficient Velocity, and Questionable Questing – that I want to remove. Specifically, I hate seeing indicators of how much is left in a forum thread, because I keep thinking about how much content is left. It stops me from immersing myself in the story. It stressed me out. Before I learned to…
2024 · github.com · its alternatives →
- 7
A thrust-vectoring model rocket flight computer. Comes with all you need to keep your rocket pointing up. - AdamMarciniak/CygnusX1
2020 · github.com · its alternatives →
- 8NF
Two weeks ago I posted a link to my side project (http://flightlite.com) and got some great feedback from HNers. I've spent a lot of time tweaking and improving based on that and I'm really happy with the result - it's much more usable and useful now! What's better: - reduced complexity of the main tracking page based on feedback from #veb - new search functionality (auto-completion, blended all search types into one search box) - thanks #robyates for your input - failover to large Google Maps view if Google Earth isn't installed with prompt and link to install from - added a proper 404 page…
2011 · flightlite.com · its alternatives →
- 9IB
I built a tool to roast landing pages with AI agents. I was gathering feedback from watching landing page roast videos, and figured out I could prompt LLMs to analyse a screenshot and roast based on the same criteria. It's not 100% accurate yet, but it has been really insightful when I've tested it on my own websites. Let me know what you think!
2024 · roastmylandingpage.io · its alternatives →
- 10WP
This was my recent weekend project, aimed at teaching me JavaScript, a bit of HTML5, and (mostly) WebGL. The orbital data are from NASA JPL. I was inspired in part by this Flash app: http://www.dynamicdiagrams.com/wp-content/uploads/2011/04/orrery_2011_bce.swf, but wanted to do something in 3D. Coming from the games-dev world, this is my first introduction to web coding. The UI is jquery. I mostly used http://learningwebgl.com/blog for the 3D stuff. Being WebGL, it will work mostly on Chrome, Firefox 4 Beta. Forget about IE. I needed to figure out how to render text to the WebGL canvas - I…
2011 · solar-system-explorer.com · its alternatives →
- 11
Today is the 55th anniversary of Apollo 8. I figured it would be fun to make a CAD model with a space for a model rocket engine and also as an augmented reality model. The tutorial is for Fusion360 but the steps can be adapted to most CAD programs. I would love to know what you all think!
2022 · makezine.com · its alternatives →
- 12AR
Hi HN, I’m sharing a small open-source project I’ve been working on: a native C++ ballistic solver that computes launch angles to intercept moving targets in real time, under gravity and air drag. Instead of relying on vacuum assumptions, closed-form equations, or lookup tables, the solver formulates the intercept as a nonlinear problem and solves it numerically using time integration and iterative methods. The motivation came from game and simulation scenarios where simpler approaches tend to break down: - moving targets - strongly curved trajectories due to drag - real-time constraints The…
Jan 2026 · its alternatives →
- 13WB
Introducing my latest project, We Build Landing Pages. https://theredbit.github.io/webuildlandingpages/ Excuse the blatant infancy of the project but I take 'releasing early and often' pretty seriously. The goals of this project are to... 1. Build a solid network of clients who need landing pages while learning how to run a business and to help earn funds to survive while I search for a job. Long story, I'm in a rough spot and I'm trying to get on my feet. 2. Build and release open-source tools and foster the growth of a community based on this work to help developers…
2018 · its alternatives →
- 14
Hi HN, Would love your thoughts on Open Paper Digest. It’s a mobile feed that let’s you “doomscroll” through summaries of popular papers that were published recently. Backstory There’s a combination of factors lead me to build this: 1. Quality of content social media apps has decreased, but I still notice that it is harder than ever for me to stay away from these apps. 2. I’ve been saying for a while now that I should start reading papers to keep up with what’s going on in AI-world. Initially, I set out to build something solely for point 2. This version was more search-focussed, and…
Dec 2025 · openpaperdigest.com · its alternatives →
- 15
Interactive 3D walkthrough
2021 · demo.shapespark.com · its alternatives →
- 16
Hi all! I've been doing spacecraft system engineering since grad school and got to keep doing it after school at Care Weather. I tried several approaches for keeping hundreds of napkin math equations and connected simulations up-to-date, but none of them were both reliable and easy to use. To solve that, I made Oneil, a design specification language with clean syntax for specifying and evaluating math describing a complex system. Oneil has been really helpful as we design one satellite iteration after another for ground testing and spaceflight. I'm really interested in hearing feedback and…
2024 · github.com · its alternatives →
- 17OW
Hello HN! My partner and I just published issue #5 of The Orbital Index, our brief & technical weekly newsletter about space science and the space industry, and so we've taken the project out of beta. The process of finding a voice and fine tuning the level of technical detail is ongoing, but we feel like we've arrived at something succinct, interesting, and technical, in a large part because of the great feedback that we have received from HN subscribers from our last Show HN (https://news.ycombinator.com/item?id=19227434) a month ago. Here's our website, where you can signup…
2019 · its alternatives →
- 18IM
Full write-up explainer blogpost here: https://dayvonjersen.com/blog/announcing-dj.exchange Maybe I should have linked that instead of the landing page??? What do you think I'm new to this :)
2023 · dj.exchange · its alternatives →
- 19
Grok algorithms! This friendly, illustrated guide teaches you the core algorithms you
2014 · manning.com · its alternatives →
- 20
Paste your URL. Find what's killing conversions.
Jun 2026 · landingroast.app · its alternatives →
- 21OM
Hello HN, www.LandingGear.me is designed specifically for building single page landing pages. Our first MVP got a good response with a few hundred people visiting and downloading templates. So we've taken it to the next level of development, added more features and functions and added an option to pay. We're now wanting to get a little more validation and feedback. Would you mind please having a look and posting your feedback here? thanks! Anton Winter
2014 · its alternatives →
- 22IM
My niche is LSAT prep. I write books of explanations to LSAT practice tests. It's a pretty big industry, as people will pay a lot to improve their odds of law school admissions. I realized that, with my books, I have ~400,000 words of quality content that people search for. Lots of long tail searches for individual LSAT questions. So I made a site of free explanations for the most recent LSAT: http://lsathacks.com/ Took about a week to write them and put them up. If it goes well, I'll release my other explanations. Hope to make this a hub for LSAT study. If it's well received,…
2013 · its alternatives →
- 23IM
Hello everyone! I made a new Open Source landing page for agencies or studios and designed based on BetaMax. The site is built with Astro and Tailwind CSS The template is super simple and includes: - A landing page. You can see it live here: - https://astromax.vercel.app/ And grab the code and make it shine here: - https://github.com/michael-andreuzza/astromax *It's already submited to Astro's themes directory. Hope you guys like it and enjoy it. Take care!
2023 · its alternatives →
- 24
Hey any astrophysicist reading hn there? Was sick in august (yeah isn't that nice) and made a small python fits table viewer for the terminal with textual. It would be great to have people try it so if you find any issue I can improve it. If you have no FITS file but would like to try regardless there are some test file in `/test`. Ciao!
2024 · github.com · its alternatives →
Also compare
- I built an autopilot for the lunar lander game alternatives
- Free e-book about WebGPU Programming alternatives
- I wrote a technical history book on Lisp alternatives
- Rocket Launch and Orbit Simulator alternatives
- I published a book to save you from my software architecture mistakes alternatives
- My first programming project – userscripts to change forum UIs alternatives
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 →