Apps to Convert Images to PDF

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.

sK1 is a versatile, open-source vector illustration program designed for professional graphic design and desktop publishing. It offers comprehensive tools for creating and editing vector graphics, with strong support for SVG and excellent color management, making it a robust alternative for illustrators and designers.

qvPDF is a versatile PDF creator for Windows, operating as a virtual printer driver. Its modular plugin architecture allows users to perform various actions after creating a PDF, such as merging, splitting, encrypting, and converting files.

NAPS2 (Not Another PDF Scanner 2) is a free and open-source document scanning application. It simplifies the process of scanning documents into various formats, primarily PDF, with support for OCR.