PDF version of TerminalFour's End User Manual
End User Training
Web Content Training Presentation
Web Content Training
Create a pdf - If you don't have Adobe Acrobat Professional, this is a good option for converting files to pdf.
Compress a pdf - If you have a pdf that is over 1 MB, it should be compressed before uploading.
Image editing - If you don't have Photoshop, Pixlr offers a handful of editing options.
https://pixlr.com/editor/Don't download the desktop version. Use the browser version.