Ueli is the best but still I think I have to change it to microsoft search application not bing or floating immersive ui search
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Listary - Listary is a revolutionary search utility for Windows
Wondershare PDFelement - All-in-one PDF editor