The easiest and elegant way is to use the command trash-empty First need to install trash-cli sudo apt-get install trash-cli
Image to PDF Creator
Often I need to create PDF file from couple of images. After short research I found the Image-to-PDF-Converter-Free to do the job very well and is has quite simple interface. http://download.cnet.com/Image-to-PDF-Converter-Free/3000-10743_4-10900970.html