Arduino IDE (Native)

Requires ports:

Install the port (as root):

cd /usr/ports/devel/arduino
make install clean

To run:

/usr/local/bin/arduino

or, if your paths are set as normal, just

arduino

Edit settings in ~/.arduino/preferences.txt:

serial.port=/dev/cuaU0
launcher=/usr/local/bin/firefox

Use /dev/cuaU0 for a USB/serial adapter, or /dev/cuau0 for a real serial port.

Also, make sure the user is in the dialer group or has rights to /var/spool/lock.