WindowTabs

WindowTabs offers a free, open-source solution to manage desktop windows like browser tabs. This portable tool works with nearly any program—resource managers, Office, PDF viewers, WeChat, editors—adding a clean tab interface. Effortlessly group, merge via drag-and-drop, and switch between windows in a tab set. It eliminates taskbar sprawl and accelerates multitasking, all in a lightweight package that requires no installation and leaves no trace on your system.