TFTP server and client
1. Tftpd32 is a great TFTP server and client that also includes a DHCP, SNTP and Syslog server. If you still need more convincing to download, Ttfpd32 is Cisco's recommended TFTP utility.
2. PumpKIN is another excellent TFTP server and client. PumpKIN is one of Packet Magazine's "Top 5 Freeware Tools for Cisco Network Administrators"
(If you would like to know the other 4 Freeware Tools, send me a comment and I will post them)