1.1

• Bug fixes for running cron events and adding cron schedules
• Added a cron spawn test to check for errors when spawning cron
• Various small tweaks
• WordPress 3.4 compatibility

1.0

• Input of PHP code for cron events
• Non-repeating cron events
• Handles cron events with arguments

0.3

• Internationalization
• Editing/deleting/execution of cron events
• More text, status messages, etc.
• Allow a user to enter a schedule event in a human manner
• Looks better on WordPress 2.5

0.2

• Fully documented the code.
• Fixed the bug that the activate action wouldn't be run if the plugin wasn't in a subdirectory.
• Now will play nicely in case any other plugins specify additional cron schedules.
• Minor cosmetic fixes.

0.1

• Super basic, look at what's in WP-Cron functionality.