ONLYOFFICE is a fully-featured open-source office suite that offers a powerful PDF toolkit. This powerful PDF editor makes it a great replacement for day-to-day document work, as it’s not just a ...

Gimp is normally used to create or manipulate images files, but can also work with PDFs if you understand how it works and what it's limits are. If you’ve never used Gimp—a free image editor available ...

Portable document format (PDF) files remain a popular choice for business documents ranging from contracts and forms to manuals and reports, so there's a good chance you need to open them often.