PDF Basics 
This is a portable free PDF tool for Windows.
It allows you to compile a list of PDF files via drag and drop and merge it into a single file.
Setup
- Download pdfbasics-1.0.1-win-64.zip (30MB)
- Unzip the archive locally
- Run
pdfbasics.exe
Usage
- Drag and drop PDF files from a file browser to the application window of PDF Basics.
- Click Merge PDF files and wait until a final dialog message pops up.
- The resulting file is stored in your home directory and is named
merged_TIMESTAMP.pdf.
Screenshot
