Free C course called "C Systems Lab"

C Systems Lab is a free interactive web course that walks through 10 modules of systems programming in C: compilation, pointers, dynamic memory, structs, the preprocessor, file I/O, processes and signals, sockets, concurrency, and a tour below C. The free course itself is the link. Get the free sample of the PDF by adding "/demo" to the link. Since I don't necessarily like the paywall aspect of it, you may ask me for the complete edition by reaching out via email. Happy to answer questions about the content or the curriculum design.

Visit csystemslab.com ↗Alternativestop 9% of May 2026

Does the same job

all alternatives →

LC
Learn C and its lower levels interactively, in the browser2019 · ▲356
I made a simple virtual machine that runs C in the browser.This project is made as an experiment to see if C can be learned easier if the lower level is covered in paralel. Sandbox: https://vasyop.github.io/miniC-hosting Tutorial part 1: https://vasyop.github.io/miniC-hosting/?0 More info: https://github.com/vasyop/miniC-hosting/blob/master/README.md Please support this project: https://github.com/vasyop/miniC-hosting/blob/master/support.md
CA
C0D3 – A free, interactive site to learn coding2020 · c0d3.com · ▲261
MO
My own C compiler (just for fun)2016 · github.com · ▲175
CE
C-Experiments – For people who want to learn C2014 · github.com · ▲6
AM
A minimal C runtime for Linux i386 and x86_64 in 87 SLOC of C2015 · github.com · ▲172
Lambda School2017 · ▲238
A full Computer Science education - free until you get a job

More growth this month

the category →

AstraPixels▲267
A pixel-art solar system at its real current positions.
Growth · 29d ago · astrapixels.com
WorldMap.lol▲197
Put your startup on the map. Literally.
Growth · 13d ago · worldmap.lol

Launched alongside, May 2026

the whole month →

Brew ▲905
Like Claude design for email marketing
AI · May 2026 · brew.new
Kilo Code for VS Code▲897
Parallel agents, diff reviewer, and multi-model comparisons
Dev tools · May 2026 · kilo.ai
StoreClaw▲805
Grow your store profits with agents that know how to sell
AI · May 2026 · storeclaw.ai
PollyReach▲796
Give your agent a real number and voice to make calls.
AI · May 2026 · pollyreach.ai
NW
Needle: We Distilled Gemini Tool Calling into a 26M Model▲776
Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…
Life & fun · May 2026 · github.com
FM
Files.md – Open-source alternative to Obsidian▲730
Dev tools · May 2026 · github.com