PDF4teachers

For those seeking to handle more complex PDF tasks, premium software or online services with a wider range of features are often the go-to. However, this post presents the most comprehensive list of free and open-source alternatives available.

PDF4Teachers is a free open-source app specifically designed for teachers to annotate assessments returned in PDF with high productivity. As of V1.1.0, PDF4Teachers is now fully translated into English, making it even more accessible.