Simple Poll - The easiest way to create polls in Slack
Beyond Compare - Beyond Compare allows you to compare files and folders.
Vizia - Add quizzes and polls to your embedded videos
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
XXCopy - A versatile file management tool for Microsoft Windows
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.