KDE implemented subsetting in Poppler, the PDF engine used by Okular, to generate documents with embedded forms that can be more than 10 times smaller

KDE is an international technology community that creates Free Software for desktop and portable computing. Among KDE's products are a modern desktop system for Linux and UNIX platforms, comprehensive office productivity and groupware suites and hundreds of software titles in many categories including Internet and web applications, multimedia, entertainment, educational, graphics and software development. KDE software is translated into more than 60 languages and is built with ease of use and modern accessibility principles in mind. KDE's full-featured applications run natively on Linux, BSD, Solaris, Windows and macOS.