iStumbler is a free, open source tool for finding wireless networks and devices with your AirPort equipped Macintosh. iStumbler combines a compact user interface with a real time graph of signal strength and complete debugging information such as network type, name and mac address. Visual feedback of signal strength and encryption allows you to quickly find open networks, perform site surveys or just have a look at your wireless neighborhood.

Download iStumbler Release 86 (110K) for Mac OS 10.3 (Panther)

Download iStumbler GPS Plugin Release 1 (74K) for serial NMEA GPS devices.

Release 86 updates iStumbler's drag-and-drop plugin loader and introduces the built-in Log Plugin and the optional GPS plugin which integrates iStumbler with any GPS that supports the NMEA protocol over a serial or bluetooth connection. The Change Log has all the details.

View the To Do List to see features in development. Visit the Downloads page to get a copy of the Source Code or the Plugin SDK and start developing for iStumbler today!

iStumbler is available under a BSD Style Open Source License. You can download iStumbler source code. (5M), modify it freely and submit patches to me for consideration.

If you're looking for a Cocoa or Java developer please have a look at my Resume. Send me an email to suggest new features or to report a bug that's not already on the Bug List.

Download iStumbler 82 (672K) for Mac OS 10.2 (Jaguar)

Release 82 updated the user interface and fixed several bugs. It is the last Jaguar build of iStumbler.

All versions require Mac OS 10.1 or better and an AirPort or AirPort Extreme Card

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