What software do you use to schedule or auto post social media posts?

IG has this built in now

For personal branding I use schedule option of LinkedIn and X (fka Twitter) and for brand we use Publer.

TweetHunt, but seems very expensive.

To start for free, the top picks are Publer, Buffer, and Socialchamp. Publer and Buffer let you post on X. Socialchamp won't let you manage X on its free tier, but it does support unlimited scheduling for the three social networks you connect.

Jetpack

You can use Buffer!

I use Social Champ for scheduling and automating my social media posts. It's a fantastic platform that streamlines my social media management tasks.