You can use the Hemingway editor for your content creation.
The Hemingway app is a distraction-free writing and editing tool designed to help you polish your writing. It focuses on identifying common errors that bring down the quality of your prose: confusing sentence construction, overuse of weak adverbs, excessive passive voice, and the like.
Plan & schedule your social media campaigns. Track your progress with analytics.
Buffer is the most intuitive and affordable social media management tool for small businesses. Schedule social content, get engagement data and insights and see all of your posts in one place.
Google Trends is a website by Google that analyzes the popularity of top search queries in Google Search across various regions and languages. The website uses graphs to compare the search volume of different queries over time.
And just like any other Google Tool, this is completely FREE.