Zim is useful notepad like desktop application that is inspired by the way people use wikis. With Zim you’ll be able to keep track of TODO lists or ideas, to take notes during a meeting or to draft any other kind of text (blog entries, important mails, etc).
The tree of documents is created on the fly as you type, new pages are created by just typing a link. Pages are hyperlinked each other, and the system keeps track of which pages link to a given one (backlinks). Any kind of file or url hyperlink can be inserted just by typing. When clicking on a hyperlink, zim will open the file or url with the default application. Zim keeps of your way, you even don’t have to worry about saving, it autosaves on the fly as you go editing your documents.
Some key features are provided with plugins, like the calendar plugin, which allows to create calendar pages to keep a log of what you have been doing, and the task list plugin, which keeps track of tasklists created with checkboxes.