Dudle - Dudle is an online scheduling application, which is free and open source.
MarsEdit - MarsEdit is a desktop blog editing application for the Mac. It provides an offline interface to most popular blogging systems. WordPress, Blogger, Tumblr, Movable Type, and many other systems are supported.
SeMagic - Client for LiveJournal, Blogger, Wordpress
Framadate - Make your polls
BlogDesk - Blogging should be simple, but it gets complicated and time-consuming if you are serious about it.