Altacast Encoder (No longer distributed via this website)
Edcast Stand Alone Encoder
Edcast is the Granddaddy of most of the standalone encoding software.
You can find a download of Edcast Here.
Note: To get Edcast working you may also need to install Visual basic.
(Just unzip and install the .exe files as you would a normal program)
Note: All downloads supplied as seen.