Kansanopisto is a lightweight, standards-compliant admin panel for managing your site's content. With Kansanopisto you can easily edit and upload files on the server directly without the need to edit files locally and upload them via FTP.
Kansanopisto's great features include standard XHTML output, creating and direct editing of files, uploading and deleting files and full skin support via CSS. It's simple to set up and use, and the informative interface lets you browse the file system and shows you which files are editable. On top of all this, Kansanopisto doesn't cost a dime.
Remember that it might not be totally safe to run Kansanopisto on your server, because it lets the user edit and delete files and that way run their own PHP code, for example.
If you have any questions or feature requests you're free to share them. One of the main goals of Kansanopisto is to deliver a simple, robust and lightweight system that respects the current web standards and well-formedness of XHTML and CSS. This should be bore in mind by anyone wishing to contribute.