Tomboy Notes is a native Linux application which uses the Mono framework which allows you to take notes and keep track of them. It includes some very useful features which give it a “wiki” style, as well as other usual tools which help you distinguish between different types of information within a note. For those who are concerned about the Mono framework and the possible patent infringements hovering around it, one may also take a look at using Gnote. It’s identical in look and functionality, as it is merely a C++ port of Tomboy Notes.