eltclsh (editline Tcl shell) is an interactive shell for the Tcl programming language. It provides command line editing, history browsing, and variables and command completion thanks to editline features. The completion engine is programmable in a way similar to tcsh, and comes with built in completion for the entire Tcl language by default. The package also provides elwish, an interactive interpreter for the Tk toolkit. You need the editline library in order to compile eltclsh.
Ganymed SSH-2 for Java is a library that implements the SSH-2 protocol in pure Java (tested on J2SE 1.4.2, 5, and 6). It allows one to connect to SSH servers from within Java programs. It supports SSH sessions (remote command execution and shell access), local and remote port forwarding, local stream forwarding, X11 forwarding, SCP, and SFTP. There are no dependencies on any JCE provider, as all cryptographic functionality is included.
The d command runs a command in the background and redirects its output to a file. The output file is annotated with start and end time, the actual command used, cwd, host, etc. You can ask the d command to extract the last command from the output file and run it again, you can ask it to append to the file or not, and other goodies. It comes with handy little programs to look at the output, tail it, etc. It is sort of trivial, but has been streamlined over many years.
WebSH is a script that executes commands on a remote machine through Web requests. This script currently only works for Unix based servers and Unix based clients. It emphasizes the fact that a vulnerability that allows a file to be edited or uploaded is just as bad as a buffer overflow of PHP or an Apache thread.