Blog posts, page 16 [ on iamcal.com ]

Idea Instructions

Software algorithms as Ikea instruction manuals.

Aluminium Knife Forging

Turning a roll of aluminium foil into a knife, without any special tools

Watching the full 11 minutes is time well spent

Jan 31st: If you use Sublime text for coding or taking notes, then turning on autosave might be super useful. This ensures that my files get saved and synced to dropbox without me having to do anything, so I can always pick up where I left off on a different machine.

Seed Ship

If you liked paperclips, a dark room, etc but you only want to spend 10-15m playing then, Seedship is definitely worth checking out. More games like this please!

Dec 18th: As a general fan of text encodings, this short article on weird encodings seems like it was written specifically for me. Learn more about EBCDIC, KOI-8 and Punycode.

Wifi Tracking on the Tube

Long time readers will be familiar with my obsession with public transport, specifically the London Underground.

Gizmodo's analysis of Tube wifi tracking data is fascinating - including some of the truly insane paths people have taken between between King's Cross and Waterloo

Dec 11th: For next time I'm putting a UI on top of a personal project, feather looks like a pretty viable alternative to font awesome.

Dec 11th: Way back in July, I was inspired by Tripelbyte's language identification quiz, so I made my own version for esoteric languages. Never got around to sharing it outside of Slack, but here it is.

Dec 11th: Next time I pick up some of my long-languishing game projects, Voxatron looks like it's worth checking out: a voxel engine with integrated design tools.

Fly Janet

Jalopnik's in depth look at Janet airplanes, the secret airline that flies between Las Vegas and secret government facilities is crazy interesting.

There are a ton of links off to a mix of conspiracy theories and stuff that really happened, including the scary-looking X-37B robotic space plane.

Some holes to fall down:
• The rumored Aurora reconnaissance aircraft
• Rat 55, the stealth 737

About

This is the personal website of Cal Henderson, Slack co-founder & CTO.

I give occasional talks, write code and sometimes articles.

» About Cal

Archives

2026:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct
2025:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2024:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2023:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2022:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2021:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2020:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2019:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2018:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2017:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2016:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2015:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2014:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2013:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2012:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2011:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2009:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2008:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2007:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2006:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2005:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2004:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2003:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2002:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2001:	Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2000:	Jun Jul Aug Sep Oct Nov Dec

Recent Tags

ai aws books color covid emoji fonts games halflife hardware havana ibm japan lego maps math minecraft music php reading tube via-matts via-momorgan wiring

iamcal.com Since May 2000