Poper Blocker automatically removes all ad pop ups, pop unders, and overlays for a cleaner browsing experience:
https://poperblocker.com/

Hello, Goodbye blocks annoying chat widgets:
https://chrome.google.com/webstore/detail/hello-goodbye/nihpfpbibfgpgnfpbfedkdokihggapoi

Epilepsy Blocker is a simple chrome extension that analyzes animated GIFs while you are browsing the web and blocks the ones that may cause an epileptic seizure:
https://chrome.google.com/webstore/detail/epilepsy-blocker/hbkihaohhhboijhpjcmnbjlejlfejokb

Channel Blocker allows you to block YouTube videos and comments by blacklisting users and/or by using regular expressions:
https://chrome.google.com/webstore/detail/channel-blocker/nfkmalbckemmklibjddenhnofgnfcdfp

Reader Mode is a feature-packed Chrome reading extension and web app that removes clutter, ads and distractions, while also includes dyslexia support, bookmarking, annotating, highlighting, text-to-speech and many other features all in one tool:
https://chrome.google.com/webstore/detail/reader-mode/llimhhconnjiflfimocjggfjdlmlhblm

Open Live Writer is a powerful, lightweight blog editor:
http://openlivewriter.org/