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.
Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.
Twishort - Twishort is a best Twitter app for writing longer tweets. Tweet more than 140 characters
Clever - syncing between education applications for K-12 schools
Twitter text Splitter - Twitter text Splitter is a chrome extension that helps you to publish multiple tweets of your writing or a paragraph on your newsfeed.
Claroline - Claroline is a collaborative eLearning and eWorking platform.