Snarf is a simple utility that is similar to wget, curl, ncftp, lynx, and fetch. Its main advantage is its small size (it's ideal for using on a rescue disk). It is also full featured, supporting ftp and http resume, http and ftp authentication, http redirect, proxies, SOCKS, gopher, progress indicators, and it uses configure.
Simple network top (sntop) is a curses-based console utility in the spirit of top that polls network hosts at a regular interval to determine their connectivity and displays the results in a pretty format. Advanced features are supported, such as automatic HTML generation of results, secure terminal mode, execution of an external file on connectivity changes, a daemon mode, and user/system configure files.
Soft-E-Sales is an electronic commerce solution developed for business to business sales, but would also be suitable for business to consumer applications. It provides encrypted order transmission, SSL, large catalogs with an SQL database, support for images, daily features, and search capabilities.
Soupermail is a generic form to email handler that does things like handling PGP/GPG encryption, file upload/download, saving form contents to a file, DBI/DBD database support, multiple file and email templates, multiple recipients, cookies, form expiry dates, sending HTML formatted mail, and PDF generation.