Yandex.Images - search for images on the internet, search by image
Dexpot - If you don't have Dexpot yet, the new update makes it a must-have tool for Windows, adding a ton of features to your desktop that you never knew you wanted.
Google Images - Google Images is a search service owned by Google that allows users to search the World Wide Web for image content.
VirtuaWin - VirtuaWin is a virtual desktop manager for the Windows operating system (Win9x/ME/NT/Win2K/XP/Win2003/Vista/Win7/Win10). A virtual desktop manager lets you organize applications over several virtual desktops (also called 'workspaces').
SauceNAO - SauceNAO is a reverse image search engine.
i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.