FreePOPs tutorial
Starting FreePOPs
FreePOPs works both under Windows and POSIX systems.
Linux
If you are using a supported distribution like Debian you can directly open a shell and type freepopsd. If you compiled FreePOPs from the source with make all you should be able to start it with src/freepopsd -p 2000 from the sources directory.
Windows
Inside the Start menu you should look for FreePOPs and start it from there. You can drag it to the Autostart menu to have it start automatically at computer boot.
Mac OS X
Run a Terminal, move to the directory you've installed FreePOPs into (with cd /Directory/where/FreePOPs/is/installed) then run ./freepopsd.