Use notes to track any and all information about a running campaign or game.  The notes are hierarchical, so entries can be grouped to make them easier to find.  Also, the groups can be expanded or shrunk making it easy to show or hide information dependent on its relevance.  There is also a search field that can be used to find any entry based on the text of the entry.  You'll never have to fight over "what was the name of the old man at the table in the dark corner of the inn?" or "What was the name of that powerful deadly artifact we were supposed to find?" ever again.