Mac OS X Software from FlrSoft
Using this application you can start/stop the TFTP service on your Mac and change its working path, that's where the files are sent to and received from by any TFTP client (e.g. a Cisco router or switch). In addition, other features are available to help you to seamlessy send and receive files from any TFTP enabled device to a Macintosh acting as TFTP server.
This is useful if you have a lot of network devices and want to store in a safe place all their configuration files and operating system binary images. These files can be reused later (or modified using a text editor on your Mac) to easily configure from scratch other similar devices or update their system image files.
TftpServer Home Page