Formal:
* Presented by
* Sponsored by
* Made possible by
* Supported by
* In association with
* In partnership with
* Underwritten by
* Funded by
Informal:
* Created by
* Produced by
* From the makers of
* Thanks to
* With the help of
* Featuring
* In collaboration with
* Courtesy of
Specific to a company:
* A [company name] production
* A [company name] initiative
* A [company name] project
For events:
* Hosted by
* Held by
* Organized by
* Presented at
For specific types of content:
* Directed by
* Written by
* Illustrated by
* Designed by
The best option will depend on the specific situation and the tone you want to convey.