Just like software, hardware can also be free.
You wonder how you can make money from that. Well, just looking at the design won't do anything to your income. But you're free to use any OSHW design in your own products. You don't even have to ask for permission. Is it commonplace? Yes, the vast majority of consumer electronics is based on so-called "reference designs", usually supplied by component manufacturers like AMD, Texas Instruments, Maxim and so on. But they only supply the design, not the physical layout.
With OSHW, things are different. You can share any design, schematic and/or physical. Just like open source software - just use it. Even for commercial products.
The Windows-only programs Watchtower Library and Watchtower Reader (so far only published in 2006) are powerful study tools. Now, us linux-users also want to use it. For the moment, it works very well in most linux distros through the WINE (WINE Is Not an Emulator). Typically you would write something like apt-get install wine to install it.
An impoved, light-, non-installable and online multilanguage-version of the program (though including only post-1999 literature) is available on wol.jw.org
Watchtower Library 2012 on linux
wtlib-icons (GPL assuming fair use upstream)
Most of the below is now outdated since wine implements the functionality:
wtlib-friendly fonts for linux
wtlib-scripts for linux
Dvorak is (among other things) a keyboard setup to ease and speed typing on a computer keyboard.
Prøv Norsk Dvorak!
My custom dvorak keyboard that eases writing Norwegian, Spanish, French, *NIX ...