Blog compass is an app that helps bloggers manage their site and find topics to write about. Blog Compass suggests trending topics based on your interests and posting history. You can track site stats, approve comments, and read tips for how to make your blog more successful all in one place. The app is compatible with WordPress and Blogger blogs.
schnack is an awesome, ad-free, open source Disqus clone that comes with a very minimal, hackable code base.
Coming Soon: Kelvin – a community making the internet a better place for everyone, one website at a time.