There aren't really any programs available for timelines except for project management software and MIT's Simile project (which you have to manually edit the code to make timelines with). I have used Calizo before and was glad to find it still out there. There really is only one! I wish there was a better setup for printing, though -- I tried to change it to landscape but it didn't really seem to register. I think that's the only thing I would want to improve -- to make the printing and sharing, exporting features more robust so that it can be used as a timeline-creation software as well as a calendar. There are already so many calendars out there but not many timeline-creation softwares. Even if its functionality is still targeted as being a calendar, it couldn't hurt to give it that dual purpose... Anyway, thanks so much for the software and keep up the great work! :)