Sked is a personal organizer, calendar, schedule and braindump application with a wiki-like syntax for text formatting and organization. It's easier think of it as the result of the merge of a calendar with a desktop wiki.
Everything is tailored to speed up editing operations and ease the usage workflow: links and styles are unobtrusively inferred from the syntax, entries are automatically saved after a few seconds, almost all commands have keyboard shortcuts, and the last entries are kept in a history. Also, the wiki code is not hidden from the editing interface -- this makes editing easier, avoids the create/view/change cycle, and allows copy and pasting text among other applications without loss of information.
There are no reported vulnerabilities