PDF editors
PDF 切割或合併軟體 (PDF split and merge tools)
- Download the free and open source PDFsam Basic - PDFsam on Win
, macOS 
& Linux 
- $ PDF Split & Merge: split PDF or/and merge PDF files free - Icecream Apps on Win & macOS
PDF 旋轉
- Powerful PDF Editing On Your Mac - PDFpen on macOS 可免費使用