OpenBSD Ports

Install ports tree

You'll probably want this, if even to just search what is available: 

ftp ftp://ftp.openbsd.org/pub/OpenBSD/5.2/ports.tar.gz
tar -zxf ports.tar.gz -C /usr
Display build options
make show=FLAVORS
Build with specific options
cd /usr/ports/editors/vim
env FLAVOR="no_x11" make
Get a complete list of ports
gfind /usr/ports/ -mindepth 2 -maxdepth 2 -type d -! -name CVS | sort | gcut -d "/" -f 4- > ~/ports