Submit portable freeware that you find here. It helps if you include information like description, extraction instruction, Unicode support, whether it writes to the registry, and so on.
The iPhone and other tablet devices have the ability to interpret a rapid double space as a period-space, in order to make using the touch keyboard much faster. iSpace attempts to provide this functionality for Windows. http://www.portablefreeware.com/index.php?id=2484
Please check it out and vote!