TAO is a powerful outliner built for MacOS X 10.5 and 10.6. Using TAO, you can efficiently manage and organize pieces of information.
The application is capable of importing graphics and multiple fonts for text, can split and zoom editors, features, multiple columns, inline comments, multiple-file find, highlighting with color labels, cloning, hoisting, labeling, bookmark, filtering, linking among items, fields and texts, linking to files, background colors for text, item and document, cascading style sheet, named styles, can export to text, RTF, doc, HTML and OPML files, as well as import from text, RTF, doc, OPML, MORE, ACTA, and ACTA 7 files.