You have a free pdf converter\creator solution
A batch image converter and resizer
WorkerPDF is GUI for GhostScript created for PDF conversion
Gerber to PDF converter
PDF Combiner is a user-friendly, GUI-based tool built in
PyExe: Cbz to pdf converter [Improved.Simplified.Alternative]
Convert files like docx, xlsx, pptx, html, and more to MarkDown
PDF File Converter / Compression / Fusion
Image 2 PDF Converter [Improved.Simpllified.Alternative]
PDF-Docx Generator [Improved.Simplified.Alternative]
Docx-2-PDF: The Converter [Improved.Simplified.Alternative]
Convert pdf to a djvu using profiles with all options of pdf2djvu
The DjVu complete solution,with OCR Technology(Arabic ,English).
tiny tool to change ppi of a jpeg
Simple Graphical frontend for merging and converting DJVU from PDF.