Alternatives
Products that do what G# –> a new dotnet language like Go/Swift/Kotlin with C# interop does
I started working on this back in 2019, mostly as a design idea. Over the last month I made a big push to make it 100% usable and replace C# in all my personal projects. I now feel it's solid enough to gather feedback from other developers. If you take it for a spin, I hope you enjoy it and send your thoughts!
- 1C6
2014 · github.com
- 2CT
2015 · duoco.de
- 3FA
2018 · github.com
- 4NO
Hello HN! The day has finally come to stop adding features and start sharing what I've been building the last 5-6 months. It's a bit of CrewAI, OpenDevon, LangFuse/Cloud all in one, providing devs who prefer TypeScript an integrated framework thats provides a lot out of the box to start experimenting and building agents with. It started after peeking at the LangChain docs a few times and never liking the example code. I began experimenting with automating a simple Jira request from the engineering team to add an index to one of our Google Spanner databases (for context I'm the…
2024 · github.com
- 5IM
I recently decided to try out Google Tasks as my only task management system, and while I find some things about the interface great, it really isn't suited for someone like me who has multiple lists with lots of elements on each. So, I whipped this together real fast and I can't imagine using Google Tasks without it anymore. I realized you might want it too, so I put it on the web. Enjoy :)
2011 · gtasker.com
- 6BA
I've been specializing in UI for over a decade. Using code for UI is great but I always wished there was a more visual code to build apps and sites. So I went ahead and built it. Decided to build it with Compose Multiplatform since I work a lot with Kotlin. Currently exports to CMP as it was simpler due to the context switch. You can try it for free and export some apps
2025 · license.builtwithpaper.com
- 7IM
Mar 2026 · github.com
- 8JA
I always thought Google's Just a Line experiment[1] was crazy cool and recently wanted to revisit it. But it hadn't been updated in 7 years So I upgraded all of the dependencies (including the latest version of Swift 5), added SwiftLint and SwiftFormat, and got it (mostly) working again! Hope you have some fun with it- help welcome there's still more to do! [1] https://experiments.withgoogle.com/justaline
2025 · github.com
- 9LP
Hi! I am doing a learning project, attempting to build an imperative language (and interpreter). The end product will be useless for others, I just want to learn and better understand how to build imperative languages. :) If someone else shares this interest and want to give some good hints on good resources I would be grateful. Currently I am looking at an awesome text by Bob Nystrom. All suggestions and tips on resources are most welcome. I am very much a beginner in this, but I find this topic very fascinating. Mail me or post links here! Cheers! You can try a beta version Online at…
2020
- 10WA
After getting impatient with a "SwiftUI for Designers" course I decided to fuck around and find out. Just hours after asking my 1st question: "Are you familiar with SwiftUI?" the core functionality of this app (an exercise utility) was up and working. I've spent the past week tweaking the UI with small animations and features. It's a humble tool (local storage only) but I am nonetheless floored with how GPT has allowed me to completely skip the "learning syntax" part of development and ship something that I actually use. Not only did it lower the syntax bar virtually to 0... I've learned…
2023 · testflight.apple.com
- 11ID
Even though Wave was killed more than 10 years ago, I didn't fully appreciate its value until recently, when I had to spend a fair amount of time in some group email threads discussing complex subjects. Would using chat instead solve the problem? Not really. In my opinion, chats are great for exchanging quick single-line replies. But to have a real discussion and arrive at a meaningful conclusion, we actually need more structure, not less structure. Which made me realize I wanted a product that worked exactly like Wave, but without some of its annoying features. In my opinion, the real-time…
2022 · reresponse.com
- 12AI
2020 · kfcampbell.com
- 13CC
2021 · github.com
- 14AL
Hi HN, I build this a few months back, thinking about improving it but wanted to share as is first to see what feedback I can get. I built it to be modular and with a clean understandable codebase in mind so easily extendable. I want to add more components to it maybe... Thanks! Will add link to the repo in a comment now
2022
- 15LB
Howdy friends! Tell me if this is an atrociously terrible idea - I've been working on building a leetcode for clientside devs so we can practice React and Javascript interview questions in a more concise way, I call it clientside.dev I just finished a beta version of it yesterday and plan on releasing it with many more problems on Jan 1st but it's there if you wanna play with it open to any ideas / feedback however mean or nice it may be :)
2022 · vacation-call-335691.framer.app
- 16RV
I personally haven't event used or looked at Rust so I don't have an opinion. So now I'm interested hearing what others think? I think the syntax of Rust isn't very appealing, but that's not a good reason to /not/ look at it. Convince me? :)
2018
- 17AS
I have always dreamed of learning Swift and creating apps for iOS, but I never found the motivation to do so. I was scared by the complexity and the learning curve of programming with UIKit and Storyboard. I thought they were too complicated and too boring for me. But then I discovered SwiftUI, the new framework for building user interfaces for Apple platforms. I was captivated by its simplicity and elegance. I watched some videos and read some articles about it and I was blown away by what it could do. I decided to give it a shot and see if I could learn it and make something with it. I set…
2023 · apps.apple.com
- 18GS
This weekend I finally shipped Gryt, a project I’ve been building since 2022 — an open-source, self-hostable Discord-style app focused on reliable voice chat + text. I’m the creator. I started it after getting fed up with Discord disconnects/paywalls and wanted something self-hosted and auditable. I started on this in 2022 and had an early proof-of-concept working back then (auth + friends list), but I quickly realized WebRTC voice isn’t something you can duct-tape together. I spent a big chunk of the next couple years learning the stack (ICE/DTLS-SRTP, NAT traversal, SFU design),…
Feb 2026 · gryt.chat
- 19VN
Greetings HN, I have been working on a new programming language for the last 3 years and thought it was time to share it with some people. The core of the language is done and i have been using it to create all software related to the language: the compiler itself, the website and vman (valk manager, like npm). There's still alot of work todo but was hoping for some feedback. Maybe an interesting feature of the language is (so i think) that it's the first language with a stateful garbage collector. It basically knows what memory goes out of scope and which doesn't without having to scan for…
Feb 2026 · github.com
- 20FT
After six months of work, I am here again presenting Fluent – a tiny lang which is optimized for differentiable & reactive programming. Since I am not Conal Elliot, don't expect a beautiful theoretical unification of FRP and AD from first principles. Rather, a horrific monster that holds together mostly because a lot of duct-tape. The link points to the semi-interactive tour of the language, which will get the job done much better than I could in here. Hope you hate/like it!
Jul 2026 · mlajtos.github.io
- 21OS
Hi friends! I've been waiting for ChatGPT Code Interpreter access for so long that I decided to just build my own. I figured maybe some of you are in the same boat so decided to do it as an Open Source project.
2023 · ricklamers.io
- 22MB
Hi, so i'm making a 2D game engine with its own IDE and interpreted programming language, all are written in C# It's open source, and I'm looking for contributors! The backend engine is MonoGame, the IDE is WinForms and the project is real, not just another AI-slop... Please check it out, i promise it's an unusual thing! Here's a YouTube video showing me using the engine for making a little cute game: https://youtu.be/h_AnUg4yJWs?si=MR3nQCVvOMDP3iqg Any feedback is welcome!
May 2026 · github.com
- 23AN
We’re building an open-source language layer on top of Go, designed specifically for COBOL-style workloads: Native decimal arithmetic (COBOL-accurate) Record structures and copybook compatibility Batch jobs and transactional orchestration as first-class constructs Sequential / indexed file I/O baked into the runtime Compiles through Go for speed, concurrency, and cloud deployability Think of it as Kotlin for COBOL, or “COBOL on Go” familiar to mainframe engineers, powerful for modern developers. Test Results so far: NIST COBOL-85 validation: 77.61% overall (305/393 tests) NC…
Nov 2025 · github.com
- 24GA
Hi All, I felt like I was re-inventing the wheel by bolting similar channel architectures onto different Go structs repeatedly so I decided to extract some common types into into one library so that they would be easier to re-use: - oneshot - spsc - spmc - mpsc - mpmc - broadcast - watch The types are inspired by Rust channels so if you're coming from Rust they should feel familiar. So far I'm really enjoying using them but it'd be great to get some external feedback if you have time! https://github.com/amorey/gochan Andres
May 2026 · github.com
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