Twishort - Twishort is a best Twitter app for writing longer tweets. Tweet more than 140 characters
Readwise - Effortlessly rediscover and organize your Kindle highlights
Privatter - Privatter is the easy way to share long texts and pictures set limit on your followers. You can post them by Sign in with Twitter account to this site.
Knotes - An efficient, beautiful Kindle highlights & notes manager
Chirr App - Chirr App 💬 splits text into tweets and posts it as a thread
Clippings.io - Organize the notes you make on your Kindle