High Quality Content by WIKIPEDIA articles! Journler was a hybrid diary and personal organizer for the Macintosh. Somewhat similar to Yojimbo (software), it features a three-pane interface and supports tagging and categorizing of entries. The entries can be simple text, but also can contain images, PDFs, and other media that the Mac OS supports. While very flexible, it is more oriented toward chronological organization of entries, as in a diary or journal, and has a built-in calendar. Like many recent Mac OS applications, Journler supports "smart" folders that can automatically update themselves based on some user-delimited criteria. Journler allows nesting of folders, including smart folders, under one another, which is more unusual. In September 2009 the author, Phillip Dow, announced he would cease development on Journler. In February 2011 it was announced that Journler will be open sourced.