Free WordPress PlugIns I Actually Use

I have searched and searched and searched for Wordpress Plugins that would help me with various tasks on my blog, make my blog more efficient, more SEO friendly.  There are tons of them out there and there tons of “best wordpress plugins”, “best free wordpress plugins”, “Top Comment Plugins”, “Best SEO Plugins”, etc etc etc posts out there, but how many of them are actually useful to me and my blog (and to my fellow parent and/or review bloggers).