LEFTSIDER is a free, open-source software mainly available for Windows only, which is part of the group Productivity software within the category Software with sub classification Cataloging. It offers a simple and easy to use tool for cataloging items in your computer, organize your files into "namespaces", manage collections, create custom views, as well as index them. It comes with a set of templates for labels, folders, files, and images, as well as a menu system for easy navigation. The software also includes a powerful editor, an ability to add, edit, and search labels and their contents, as well as a simple-to-use tool for sorting and searching items. There are four main parts of this software: the main window, a small toolbar at the left side of your computer screen, several drop-down menus on the right side of the main window, a few small buttons at the top of the toolbar, and another small button at the bottom. The "add/edit" dialog box, along with the check boxes, can be used to modify the LeftSider configuration. Each time you save changes to the software, the changes are saved to your local computer, on the main menu. You can switch between multiple view panes by clicking on one of the small button on your toolbar. The application allows a user to add, edit, delete, switch between various views, as well as search and group items. LeftSider is a freeware, which means that it is available for download absolutely free of charge. The application does not require installation, and is able to run on Windows 95, Windows 98, and Windows XP. However, to fully utilize all of its features, the software must be downloaded and installed on your computer. A freeware download is usually available for free, and can easily be downloaded from the Internet. After the download, install the program and then let it begin playing on your computer immediately.