PDFTK Builder Alternatives for Linux

PDFsam Basic is a free, open-source, and incredibly useful tool for handling PDF files. It excels at core functions like merging, splitting, rotating, and mixing PDFs, offering a simple and intuitive interface for both simple and complex tasks. It's available across major operating systems and doesn't require an internet connection.

PDF-Shuffler is a straightforward, open-source tool designed for basic PDF manipulation. It allows users to merge, split, rearrange, rotate, and crop pages within PDF documents through a simple graphical interface.

PDF Chain is a user-friendly graphical interface (GUI) for the powerful command-line PDF Toolkit (pdftk). It simplifies common PDF manipulation tasks such as merging, splitting, collating, encrypting, and managing metadata without requiring direct command-line interaction.

jPdf Tweak is a versatile, cross-platform Java Swing application designed for manipulating PDF files. It offers a range of functionalities including combining, splitting, rotating, reordering, watermarking, encrypting, signing, and other essential PDF adjustments.