In a lurking-place I lurk,
One with the sullen dark.
(Theodore Roethke, "All the Earth, All the Air")
Map of Rust Result/Option transformations. (short-link: tinyurl.com/rust-transform) 
Collection of tips for making use of the Travis continuous integration system. [2015-2016]
Fuzzing Linux system calls with syzkaller (at LWN) 
Linux execve processing (at LWN) 
Linux syscall processing (at LWN) 
"High-Quality Software Engineering", a book about software engineering . Available as:
Linux/FreeBSD system call concordance [2014-2015].
Linux cross-version/cross-architecure system call concordance .
A book on Lindy Hop (but un-illustrated, therefore probably of limited use) [2007, but released 2012].
Pynamo: Exploring the Dynamo paper in Python 
Visual reference for Git 
Beginner's Guide to Linkers .
Rough guide to open-source licenses .
Translation rosetta stone for scripting languages .
Translation table for UNIX debugger commands (gdb, lldb, dbx, adb, sdb) [2007, 2014].
Learning Clojure through the REPL .
Notes on creating a decent printed copy of Paul Graham's "On Lisp" 
A blog with random technical observations. [2011-2012]
A blog about setting up and tweaking a Mac OS X laptop (mostly for future reference if I ever have to reinstall from scratch). [2005-2008]
Another blog, including some more technical entries:
Review of, notes on and references related to Stephen Wolfram's "A New Kind Of Science". 
A Tutorial Introduction to Guile .
An article investigating similarities between C++ and Lisp .
“Our almost-instinct almost true: what will survive of us is code”
Rust port of Tink cryptography library.
python-phonenumbers, a Python port of Google's libphonenumber for parsing and formatting telephone numbers .
Test suite for the PKCS#11 API.
X.509 certificate test suite.
A button for Thrutu to allow lookup of the phone number you're talking to in Yelp . [Removed due to takedown request from Yelp (despite them approving in the first place and providing an API key).]
Equivalents of UNIX
utilities for analysing Java class files and jar files .
Android tool for exploring what libraries are already present on the system .
xwindiff, a graphical diffing tool for X11/Unix [2000-2004].
A collection of C++ utility functions .
A utility (Java applet) for converting between 32-bit floating point numbers and their IEEE representations .
Tesserax – a Java applet game .
replot, a PDE plotting tool for X11/Unix .
A noddy stick figure animation program (as a Java applet) .
A Java applet to test attentional blink .
A MineSweeper game for PalmOS .
PalmOS RoboRally game .
Experimental changes to Maxima to provide a feature that translates Maxima expressions into presentation MathML .
GridFont assistant Java applet .
Bass guitar scales [PDF] .
White noise audio files .
(PDF, 2648KB) Homoclinic Bifurcations in Partial Differential Equations .
Spherical harmonics reference page .
English grammar reference page .