Followup.cc - FollowUp for email is a lightweight productivity suite that keeps your conversations and tasks from slipping through the cracks. Set perfectly timed reminders that arrive at the top of your inbox, right when you need them.
Twishort - Twishort is a best Twitter app for writing longer tweets. Tweet more than 140 characters
FollowUpThen - The simplest way to schedule an email reminder
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.
Gmelius - Gmelius is the first collaboration platform designed for G Suite and your company's daily tools.
5Tweets.com - Type a long tweet and 5Tweets will rewrite it into multiple tweets with a tweet count.