Full-Featured Trial Version for Adobe Premiere Pro
*post updated July 28, 2016
You can download the free trial of Premiere Pro CC and all Adobe Creative Cloud tools here.
The trial version of of Premiere Pro CC includes almost all of the codecs that are included with the full version of Premiere Pro. This means that you can import and export to all of the supported file formats using the trial version.
For lists of formats that you can import into and export from Adobe Premiere Pro, see these pages: