Dev tools · alternatives · 2026

24 alternatives to The Semel Editor (TM)

A new way to enter C++ programs, edits semantics, not text

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. The Semel Editor (TM) launched in 2024; newer entries below may have overtaken it.

1
Typedream▲1,426
No-code site builder, easy as Notion, pretty as Webflow
2021 · typedream.com · its alternatives →
2
Typed▲526
Next-generation document editor and collaboration tool
2022 · typed.do · its alternatives →
3
Medium Editor▲266
The dead simple inline editor toolbar
2016 · yabwe.github.io · its alternatives →
4
vim.so▲444
Learn vim fast with interactive exercises in the browser
2021 · learnvim.com · its alternatives →
5
Params Editor for Chromium Browsers▲190
Edit URL Query Parameters with Smart Input Types
2025 · params-editor.isolpro.in · its alternatives →
6VO
Vim online editor using WebAssembly, storing files using IndexedDB▲316
2023 · vimonlineeditor.com · its alternatives →
7AP
A plain-text file format for todos and check lists▲452
After having cycled through various CLI-based todo apps, I started to realise that I actually don’t need a tool at all for managing my todos. Most of the time, my use cases are quite simple, like viewing my todo items, checking them off, or adding a new one. Rather than having to memorise CLI commands for these interactions (which I’m not super good at), I figured that it’s easier for me to use my text editor directly, and have an editor plugin help me with the visual structure and some convenience functionality. So, kind-of similar to Emacs Org Mode, but without having to use Emacs. I…
2022 · its alternatives →
8
A simple, tiny Vim and kilo-inspired editor▲120
A dead simple editor. Contribute to hellerve/e development by creating an account on GitHub.
2017 · github.com · its alternatives →
9
Twigg▲157
Hi HN, we’re Jamie and Matti, co-founders of Twigg. During our master’s we continually found the same pain points cropping up when using LLMs. The linear nature of typical LLMs interfaces - like ChatGPT and Claude - made it really easy to get lost without any easy way to visualise or navigate your project. Worst of all, none of them are well suited for long term projects. We found ourselves spending days using the same chat, only for it to eventually break. Transferring context from one chat to another is also cumbersome. We decided to build something more intuitive to the ways humans think.…
2025 · twigg.ai · its alternatives →
10
Trix▲184
A rich text editor for everyday writing
2015 · trix-editor.org · its alternatives →
11
McWig – A modal, Vim-like text editor written in Go▲152
Hey! Check out my "toy" text editor which I use as my daily driver. Features LSP autocomplete, goto definition, hover info Tree-sitter support Color themes (borrowed from the Helix text editor) Lots of bugs Macro support Something like Emacs org-mode: Open test.txt, place the cursor at line 15, and press "Ctrl-C Ctrl-C". This project was written as a "speed run" — not for speed in terms of time, but rather as an exercise to explore the text editor problem space without overthinking or planning ahead. It’s a quick and "dirty" implementation, so to speak.…
2025 · github.com · its alternatives →
12
Notion-style editor for Tiptap Cloud▲195
Collaborative block-based editor → ready to drop in your app
2025 · tiptap.dev · its alternatives →
13
TextJam▲143
The multi-player AI editor, for everyone who writes.
2025 · textjam.com · its alternatives →
14
Tweening web visualisation, in Rust – (WASM)▲94
Using wasm-bindgen, and the tween-rs crate
2024 · rustween.mtassoumt.uk · its alternatives →
15
Thimble by Mozilla ▲152
A web based code editor that helps you learn as you code
2015 · its alternatives →
16
Rhine – A typed Elixir-inspired language on LLVM▲81
🔬 a C++ compiler middle-end, using an LLVM backend - artagnon/rhine
2016 · github.com · its alternatives →
17
Caramel – a modern syntax for the lambda calculus▲130
A modern syntax for the λ-calculus. Contribute to VictorTaelin/Caramel development by creating an account on GitHub.
2015 · github.com · its alternatives →
18
Treee▲71
A tree-structured text editor
2020 · its alternatives →
19
Ki Editor – Multicursor syntactical editor▲138
Hi everyone, I have been developing this editor, Ki, for over a year, and have employed it substantially in all kinds of development (including Ki itself) for at least 3 months. I think it is mostly crystallized, thus I'm happy to share it with you today. Its main strength is first-class multi-cursor and structural (syntax) editing, which is a rare combination in the realm of editors (TUI or GUI alike). Hope you'll enjoy it!
2024 · ki-editor.github.io · its alternatives →
20
Text editor with inline English-German dictionary▲35
Hi When you are learning a new language, you need to practice different skills: reading, listening, speaking, writing. I find writing to be the hardest activity, not least because I have to look up words in the dictionary all the time, and that is a frustrating context switch. Here is an experimental CodeMirror-based editor, that lets you look up translations inline. Type @ followed by the English word, and get a list of possible translations, and select the translation to apply it. Online demo: https://foreign-dispatch-autocomplete.netlify.app/
2022 · github.com · its alternatives →
21
TOAST UI Editor▲119
Markdown WYSIWYG editor
2018 · its alternatives →
22
Tome, aka Tom's Editor – a new command-line text editor▲131
A command line text editor written in Node.js, focused on JavaScript. - tome/README.md at main · boutell/tome
2023 · github.com · its alternatives →
23
Semlib – Semantic Data Processing▲63
Build data processing and data analysis pipelines that leverage the power of LLMs 🧠 - anishathalye/semlib
2025 · github.com · its alternatives →
24
C++ Editor for Teaching How to Code▲95
2019 · emun.ro · 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 →