SwiFTP is a FTP server that runs on the Android platform. It emphasizes simplicity, ease of use, and small size.
The goal of the project is to enable an Android phone to easily share files with computers or other devices over a wifi network. These computers only need to have an FTP client, which all computers do. You can walk around with your MP3/video/ebook/whatever collection and share it seamlessly with almost any wifi-enabled system.