Development

FreeBSD binary security Updates
Provides free binary security updates and method to apply them to your system.
http://www.daemonology.net/freebsd-update/

FreeBSD Ports
A browsable database of software ported for use on the FreeBSD operating system.
http://www.freebsdports.info/

High Performance Enabled SSH/SCP [PSC]
High Performance SSH/SCP - HPN-SSH
http://www.psc.edu/networking/projects/hpn-ssh/

Official FreeBSD CVS Repository
Complete CVS repository in a web-browsable format.
http://www.freebsd.org/cgi/cvsweb.cgi/

Official FreeBSD Ports Index
A direct link to the official Freebsd ports environment.
http://www.freebsd.org/ports/index.html

Official FreeBSD Source Auditing Project
The ongoing project to ensure a secure codebase for FreeBSD.
http://www.freebsd.org/auditors.html

QEMU - Processor Emulator
QEMU is a FAST! processor emulator using a portable dynamic translator. QEMU emulates a full system (usually a PC), including a processor and various peripherals. It can be used to launch an different Operating System without rebooting the PC or to debug system code.
http://www.qemu.org/

Ultimate Boot CD
Assembles over 100 PC hardware diagnosis tools into one bootable CD to analyze and repair hard drives and boot problems.
http://www.ultimatebootcd.com/