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.
To easily perform clock related operations, You can use a portable application "Date & Time Tool" you can do following tasks with one click ;
1. Add - Delete Am – PM
2. Show - Hide the the day of the week
3. Hide – Show Seconds
4. Sync the Clock
5. Hide – Show Windows clock
... Etc.
