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Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Treepoints - Fight climate change and earn rewards
Wondershare PDFelement - All-in-one PDF editor