JPEG to PDF - JPEG to PDF is a free program that can convert image files to PDFs.
DocuPUB - DocuPUB is an online file converter, file merger, file compressor, and file resizing tool.
JPG to PDF Converter - Free online conversion of images to PDF files.
PDF Joiner - This online tool allows you to join several PDF documents into a single file, free of charge.
Convert-JPG-to-PDF.net - Convert JPG to PDF for free with this online service.
Ultra PDF Merger - Ultra PDF Merger is a freeware PDF utility that joins your PDF files, or part of them, together.