Keeping social media platforms organised can be done with apps since it's never easy. A few platforms doing this is https://www.socialpilot.co/, https://www.hootsuite.com/, https://later.com/, https://missinglettr.com/ and https://socialbee.io/. Source: about 2 years ago

AppSumo is a startup app marketplace where you can get lifetime deals on up-and-coming apps. Missinglettr was one of the apps AppSumo offered but isn't available from AppSumo any longer. You can, however, subscribe directly at https://missinglettr.com/. Source: over 2 years ago

You could technically make this in illustrator, but the actual program you’d need to be using for the whole thing is something like Adobe InDesign, or Affinity Publisher. Source: over 1 year ago

Affinity Publisher might be worth a look. Source: over 1 year ago

I use Affinity Publisher, as it is the direct competitor of Adobe InDesign. It's a one-time purchase and has all the features InDesign has for as far as I've used it so far. Only the spreadsheet handling is a little wierd. Fingers crossed they update that system. Source: almost 2 years ago

There's always Affinity Publisher. https://affinity.serif.com/en-gb/publisher/. - Source: Hacker News / almost 2 years ago

There are professional layout tools like Indesign or Affinity Publisher. The latter is very affordable and comes without a subscription. Source: almost 2 years ago