FSP is a UDP-based protocol for transferring files. It has many benefits over FTP, mainly for running anonymous archives. It is usable on lines with high packet loss ratio (70% WiFi), can go behind firewalls and unnoticed by port scans (because of UDP), does not overload networks when hosting ISOs or movies, share files on modem lines without eating all of the bandwidth, and keeps lamers away from your site (they don't know how to get to it). This project is active continuation of the FSP code base (abandoned 1996-2003).
retawq is a multi-threaded Web browser for text terminals on computers with Unix-like operating systems. It is fast, small, nicely configurable, and comfortable; e.g. the low-level network communications are performed in a non-blocking way, and you can keep open as many "virtual windows" as you want and work simultaneously in two of them in a split-screen mode.
JFTP is a graphical FTP client that allows you to transfer files securely over the Internet using FTP and SFTP. It includes support for all basic and advanced FTP tasks, support for SSL with 128-bit encryption, multiple concurrent FTP sessions, a secured favorites manager, and a certificate manager. Internationalization and localization is fully supported, and multiple deployment options are available, including standard installation, a Java Applet, and Java Web Start.
netstiff (formerly known as webdiff) is a powerful Web and FTP site update checker. It supports a variety of different methods (diff, HTML, size, date, MD5 sum, regexp) to check for updates. There are also sophisticated settings to make it useful for partly dynamic Web pages. Without any given arguments, netstiff will either run its interactive configuration tool or check your sites for updates and print the changes in a diff(1)-like manner.