SetApp: A Suite of macOS Apps for a Single Price Affiliate link for a great collection of 200+ macOS apps for a single price—now with iOS apps too.
The Van Gogh 
Museum in Amsterdam has provided an exceedingly well done Website featuring all 902 letters from Vincent van Gogh, complete with high resolution images, transcriptions and translations, and, best of all, illustrations and annotations. The Quick Guide is a good place to start.
