curl is a command line tool for transferring files with URL syntax, supporting FTP, FTPS, TFTP, HTTP, HTTPS, TELNET, DICT, FILE and LDAP. curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, cookies, user+password authentication (Basic, Digest, NTLM, Negotiate, kerberos...), file transfer resume, proxy tunneling and a busload of other useful tricks. Read more
(shareware) DeepVacuum is a useful web utility based on GNU wget command line tool. Program includes a vast number of options to fine tune your downloads through both http and ftp protocols. DV enables you to download: whole single pages, entire sites, ftp catalogs, link lists from a text file, filtered types, ex. images.
DropCopy uses Bonjour (Rendezvous) technology to help you to easily and quickly share files and folders between multiple Macs across your LAN.
FileSync is a file synchronization utility
MultiCom bridges two communication ports together. The ports may be any combination of serial, TCP (client or server) and socket file (client or server).