I created the memorial invitation and program in Google Slides. If you are unfamiliar with it, Google Slides is a fairly simple program to use. I pasted pictures into a blank document until I was happy with the layout, then added my text on top. The nice thing about Google Slides is that I could open it from anywhere that had internet access (even on my phone while sitting in the passenger seat when I thought of a great reading to add...) AND I could share it easily via email with other people who were helping me plan. Multiple people can be editing the document at once.
If you don't want to create your own layout, there are some downloadable templates that you can also use. At some point I would like to create a collection of editable templates to share on this site, but for now there are a few nice ones on Etsy. Here are a few from the Etsy shop November Memories that are very well done (I am not affiliated with the company that sells these, I just think they are lovely. Questions about the templates for sale should be directed to the business owner):