Highland might be a bit more popular than Sumatra PDF. We know about 1 link to it since March 2021 and only 1 link to Sumatra PDF. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You can use your browser for both, there are extensions(FireFox - PDF & EPUB/Chrome - PDF& EPUB) for that. In case, you want you use a separate software for them, I suggest SumatraPDF--it handles both PDFs and .EPUB files. Source: over 1 year ago
Eight years ago screenwriter (and dev of the Highland writing app for the Mac) John August had Courier Prime created, then released it under the SIL Open Font License (OFL) license, meaning commercial apps can embed or bundle it. Source: over 2 years ago
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