A full-featured Java based FTP client that runs in the context of your web browser. [Free for non-commercial purposes and commercial versions] http://www.jscape.com/ftpapplet/
Takes care of the limitation posed by traditional HTML upload forms by allowing upload a whole directory and the files within it with a single click. [Open source, GPL] http://jupload.sourceforge.net/
An applet that allows you to add speech synthesis to your website (not streaming audio). Utilizes concatentation method, formant synthesis being developed. http://www.say-it-now.com/
Applets reads simple regular expressions and builds a state machine that recognizes regular expression. Provided source code is appropriate for educational purposes. http://www.oursland.net/projects/regexp/