Like cat, but is language and syntax aware. Syntax highlighting. Git integration. Uses less for pagination if it's there. It's even in Homebrew.
Write your apps in Python and release them for iOS, Android, Windows, MacOS, Linux, Web, and tvOS using rich, native user interfaces. One codebase. Multiple apps.
A development library that allows the programmer to readily manipulate IP addresses, the ARP cache, the system routing table, and packet filtering rules. It also makes it easy to manipulate IP tables and construct and send IP packets and Ethernet frames.
An application that lets any laptop act as a DJ console. With it, you can mix audio files in many formats.
An open-source drum machine and MIDI sequencer that also uses AI technology to figure out melodies for the patterns you program.
A ports collection (archive of installable opensource software) for Mac OSX, just like the BSDs and Gentoo use to manage applications.
The homepage of GPGtools, a port of GnuPG and an associated toolkit to MacOSX. Includes everything you'll need to seamlessly integrate GPG into your desktop experience, from the GPG executable itself to plugins for the Finder, Mail.app, and Mozilla Thunderbird.
A remote login utility that is mobile aware, i.e., your link can drop (say, if you're on a cellphone) and come back up later, and your session will still be running. It's kind of like GNU Screen, actually. Also allows editing of lines prior to sending with the enter key. Adapts to network latency.
CHIRP is a F/OSS application for programming serial-enabled ham radio equipment from a computer running Linux, MacOSX, or Windows. It supports a large number of makes and models of amateur radio, multiple interfaces (including USB and serial) and formats for getting data into and out of the radio.
json is a command line utility for working with JSON-formatted data on the command line. At its most basic it'll take JSON data, reformat it so that it's easier to work with, and display it in the terminal. It can also be used to extract only certain bits of data from a JSON stream, lint and debug JSON, and filter input in various ways.
Requires node.js, though it isn't a web app.
Tunnelblick is an open source OpenVPN client for MacOSX. You can either checkout and compile the source code yourself or you can download the .dmg packages for it. Note that if you're running Mountain Lion you'll have to grab the unstable version.
Pixitracker is a simple, pixel-based sample editor and chiptune tracker that's designed to be fun to play with, so it doesn't have the hardcore (and intimidating, I'll admit) tracker interface. Pixel-based means that you specify notes and patterns by turning dots on and off by clicking on them. Designed so you can just mess around with it. Record patterns, make new samples and export them as .wav files, record sounds. MIDI aware so you can plug your favorite MIDI device in and use that as the UI. Supports multiple audio drivers, too. There are versions for Apple iOS, Android, Windows, OSX, and Linux. Samples are delineated with Space Invaders-style sprites so you can tell them apart.
An /etc/hosts file that cleans up a significant amount of internet garbage. linux unix osx indow
Homebrew for OSX doesn't remove dependencies. In these comments is a bit of hackery to make it happen. In a nutshell,
brew uninstall foopkg; brew rm $(join <(brew leaves) <(brew deps FORMULA))
A utility that lets you edit disks and recover data, including entire partitions. Supports multiple operating systems.
A Python module which implements interfaces to the native text-to-speech API for whatever platform you're running it on, be it Windows, MacOSX, or Espeak on Linux.
SoloWizard is an interactive website which lets you check off the things you do and don't want on a new MacOSX machine, and it'll generate a shell script (which you can and should inspect for veracity) that will install Chef locally, pull down the appropriate cookbooks, and set up the machine. Helps automate workstation construction, minimizes craft error in some important ways. Be sure that the cookbooks it uses are compatible with your release of OSX, though.
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