PumpKIN is an open source, fully functional, free TFTP server and TFTP client, which implements TFTP according to RFC1350. It also implements block size option, which allows transfer of files over 32MB, as well as transfer size and transfer timeout options described in RFC2348 and RFC2349.
The primary use of PumpKIN is maintenance of the network equipment (such as router firmware upgrade) that fetches images from TFTP server, although it is also useful for transfering files between parties involved in a conversation over ntalk connection using our T42 software (it also detects ntalk conversation held over now obsolete program 'wintalk'). Note: this functionality is only implemented in windows version.
The main PumpKIN features are:
Fully standard-compliant TFTP file transfer
Unlimited simultaneous transfers both for TFTP server and client
Support for TFTP blocksize option allows transfer of large files if both TFTP server and client support it
Convenient GUI
Combines TFTP server and TFTP client
Originally developed for Windows 95, it reportedly runs on all Win32 platforms: Windows 98, Windows NT, ME, XP, now also ported to Mac OS X (so far only tested on Mountain Lion)
Can run in background, taking up a 256 pixels of screen nicely packed as a 16x16 square in your notification tray area (windows only)
Open source for those willing to add missing features, fix bugs and examine code for potential flaws and fun
You're free to torture it the way you want to as long as you preserve original author's credentials
It would cost you nothing unless you're willing to monetarily express your gratitude and make a donation (yes, it means "free" or "freeware", just go and download it)
The download size is about that of the high quality screenshot below (windows only — Mac version is bigger, due to graphics supplied for way too many resolutions).
Comments and Reviews
Old, free and open source tftp client and server software, but still functional. It saved on mac
This software helps countless of people unbrick their router.