I am going to do some ghost window projections this year. I like the atmosphere fx projections but was wondering if there were any other options. I saw a fellow haunter had one that lit his house on fire - I thought that was amazing and was wondering if there was something else out there.
Atmosfearfx, spectral illusions, hirezdesigns, and hallo window, are the ones I know of right off the top of my head. There's also tons of royalty free green screen content that you can use.
I found some free projections on Youtube. Search the site for "Halloween projections". There is usually download instructions in the description under the video, or you could use a down-loader add-on for your web browser.
As Icepick mentioned, stock footage is a great resource too. Here is a link for royalty free fire stock footage: