I develop and maintain free software in my spare time. Most of the software packages available here are for Apple's macOS. They are distributed as free software under various permissive open source licenses. Some of them are on GitHub if you want to lend a hand.

If you find my software packages useful, please make a donation. I rely on your support when it comes to maintaining and improving them.



Platypus is a developer tool that creates native Mac applications from command line scripts. Such scripts can then be run transparently as applications through the macOS window environment instead of running through a terminal client.

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Sloth is a Mac application that shows all open files and sockets in use by all running applications on your system. This makes it easy to see which apps are using which files and sockets. It's basically a friendly, exploratory GUI for lsof.

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KatSearch icon


Fast native Mac power-user app to quickly find files on entire HFS+/APFS volumes by scanning the file system catalog. Do you miss the good ol’ days before Spotlight, when search on the Mac simply scanned the filesystem? Yeah, me too.

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FastDMG Icon


FastDMG is a macOS utility to mount .dmg and other disk images quickly, efficiently and without any unneeded nonsense. It is a very fast and reliable replacement for Apple's DiskImageMounter.

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mandrake icon


Native man page editor for macOS with syntax highlighting and live mandoc syntax validation. It also displays a live-updating rendered preview of the man page during editing.

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Phew Icon


Phew is an open-source FLIF image viewer for macOS that can open FLIF images, and export them to PNG, TIFF, BMP or as raw pixel data. With the accompanying QuickLook plugin, FLIF images show thumbnails and previews in the Finder and Spotlight just like regular images.

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Command line tool to quickly search by filename on HFS+ and APFS volumes. Searching takes place at the driver level using the file system catalog. This means the volume's entire directory tree can be scanned much faster than with a standard recursive filename search.

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A set of Mac command line utilities for retrieving, setting, converting and working with Mac OS X icons.

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Really old and obsolete stuff

PowerBlinken A silly application that turns your PowerBook or MacBook Pro into a blinking lightshow, using the backlit keyboard and LCD. Some of the functionality may still work on modern machines. Caveat emptor!
Tapir Mac development tool which makes it easy to create your own global Status Items in the menu bar, based on shell commands or scripts. Now no longer maintained. Some (but not all) of Tapir's functionality can now be found in Platypus.
ManOpen for Intel Extended Intel build of Carl Lindberg's ManOpen, a superior man page viewer.
Vox Machina GUI for the Mac OS X Speech Synthesizer. Can save spoken text as audio, features lip syncing animations, MP3 encoding and more. Now no longer maintained.
Explicit App to split AVI video files so they fit on burnable CDs. Uses the mencoder engine. (OBSOLETE, PPC only)
Leopard MenuHack Hack to remove the translucency of the Mac OS X 10.5 menu bar (Obsolete, functionality now in System Preferences)
MacRPM A Mac OS Classic program for viewing RedHat Package Manager package contents and extracting files from them. (MacOS Classic only)
MacDeb A Mac OS Classic program for extracting files and data from Debian .deb packages. (MacOS Classic only)