Task Manager is a web application built with React, Emotion/Styled, and Redux Toolkit, among other technologies. It features user authentication and registration, with support for user profile pictures. The app allows users to manage their tasks, including the ability to view task history and active tasks. A chart is included to visualize the percentage of completed tasks compared to active ones. The app is also localized with i18next and is integrated with Firebase to store task data. Additionally, the app is responsive and can be used on different devices.