Command line tool written in Java, that automaticly unpacks (password protected) RAR-Archives or multi-part RARs, if all belonging files are complete. It is designed to do unrar jobs on Linux-based NAS-Devices when downloading from Rapidshare & co.
jnget is a multi-platform command line tool to retrieve binaries from Usenet. It allows multi-thread downloading and partial or full headers updating and caching and has NZB support.
BatchSSH (or just bssh) is a command line tool for batch execution of commands over SSHv2. BatchSSH is implemented in Java and is therefore platform agnostic. It support's simple but flexible target host definition, SSH gateways and Single-Sign-On.