You can check out Canva. It is an excellent tool if you do not have a lot to spend (as a matter of fact, you might even be able to use it for free). You can use it to create social media graphics, presentations, posters, documents, and other visual content. If its free plan does not offer enough functionality, you can also try one of its two paid subscriptions, Canva Pro or Canva for Enterprise, for extra functionality.