JPEG to PDF - JPEG to PDF is a free program that can convert image files to PDFs.
UnityPDF - UnityPDF lets you merge, split, divide, rotate, protect PDF files and more.
JPG 2 PDF.ru - Combine multiple JPG images into one PDF file
PDFsam - PDFsam Basic, a free, open source, multi-platform software designed to split, merge, extract pages, mix and rotate PDF files
JPGtoPDF.com - JPG to PDF Online Converter. Free. Simple. Fast.
Clipperly - Convert, edit or optimize your files online. More than 400 different formats supported among documents, images, spreadsheets, ebooks, archives, presentations, audios and videos.