[jayvanguard]

Hah, interesting! Mine is writing a simple web server (sockets, IO, string handling) and an ultra-simple command line browser (args handling, 3rd party libs for URLs, HTML parsing, etc.)

[jamescostian]

And all along I thought I was creative for skipping "Hello, World" and going straight to "Hello, World" 10 times

[oskenso]

I like to write chip-8 and other VMs to get a handle Of a new lang

[jsjohnst]

Mine in similar, I implement an authoritative domain name server. I've done it in something like 20-25 languages now. The only language I've learned in the last decade I didn't write one in is ARM Assembly. I am not that "dedicated" (more like masochistic) enough to try to do one in assembly.

[jolux]

I tend to reimplement the Linux kernel from scratch a few times in every language and go from there onto the X server, desktop environment, networking stack, etc.

[jsjohnst]

Github link? ;)

[sabujp]

mine is doing everything in hackerrank in the new language

[mathw]

A friend of mine used to learn new languages by implementing Tetris in them.

Sad to say I'm here years later and I still haven't even implemented Tetris once in anything.