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LCDproc is a piece of software that displays real-time system information from your Linux/*BSD box on a LCD.

OpenLog is an open source data logger. Simple to use, simple to change. We wanted to create a serial logger that just worked. Power up this device and it will start logging any received serial data at 9600bps. Sending Ctrl+z three times will drop out of logging and in to command mode. 'new' will create a new file. 'md' makes a directory. '?' brings up the list of commands. OpenLog doesn't do a lot, but it does log serial streams extremely well. Example:

new testfile.txt
append testfile.txt
<(send large amounts of text followed by three ctrl+z characters)

That's really it! OpenLog firmware is open source and is based on Roland Riegel's FAT library. OpenLog currently supports FAT16 (upto 2GB microSD cards). We're working on FAT32 and would love your help!

an easy way to learn vim.

KeyCastr is a Mac OS X application that displays your keystrokes in a small floating window. It is intended to be used for screencasts or overhead projection, to emphasize what keystrokes need to be pressed when performing an action within an application.

Writer of "Just William", a children's book series.

do fuzzy text search in a regular index: Levenshtein automata.

BK-trees, a clever indexing structure that makes it possible to search for fuzzy matches on a text string based on Levenshtein distance - or any other metric that obeys the triangle inequality.

useful: how to set keys only when a mode is active.

freedt is a reimplementation of Dan Bernstein's daemontools under the GNU GPL, sharing no code with the original implementation.