timlinden

Remembering to post every day, and which days you already posted, is super easy with this plugin. 
It shows you a calendar with days red when there isn’t a post, and days green when there is. Green 
days you can hover over and see the title of the post, and click to edit the post for that day.

wpFutureCal

A simple calendar that displays when you edit posts, showing which days you have posted on.

Sanket Parmar

wp3sixty

Divyaraj Masani

NewVariable

Shailee Sheth

This plugin will publish all the future/scheduled post missed by WordPress cron. It will check it every 15min and publish 20 posts at a time.

WP Missed Schedule Posts

its really smart idea. works well thanks.

great job.

Auto publish future/scheduled posts missed by WordPress cron

wpFutureCal vs WP Missed Schedule Posts