Droid Explorer is a free, full-featured file and application manager for Android devices. It allows you to manage your files like you do on your desktop or laptop using multiple select, cut/copy/paste, move, create, delete, rename, search, share, create shortcut, and bookmark. It also has an application manager that lets you uninstall, backup, and get info of apps.

One of the standout features of Droid Explorer is its built-in ZIP support that allows you to compress and decompress ZIP files. It also lets you create shortcuts for favorite files/folders, shows thumbnails for files, performs SD card analysis, and sorts files by name and date. You can open files with the default handler or manually choose, and send files via email, Bluetooth, and more.

Overall, Droid Explorer is an extremely easy-to-use and simple file and application manager that provides a wide range of features to manage your Android device's files and apps.