Yessh is a bash program that uses the SSH client. It provides fast connections to Linux/Unix hosts. Just type the name you have chosen for a host, and yessh will connect you via SSH. You don't need to remember the IP address, hostname, login, or password; just one arbitrary name. Accounts with passwords are kept in a secure file where passwords are encrypted using OpenSSL with 128-bit AES. You can use the autoconnect function to connect to your server with 5 keypresses.
pssh and shmux have some customization issues, like inflexible IPs/hostnames specification, simultaneously spawning threads for all hosts (pssh), which is a problem with many hosts, or having to download/upload files with a separate command. cssh.py was written to resolve such problems. It has a fixed (configurable) length queue of active SSH threads, the ability to specify IPs/hostnames in 3 ways, configurable username, password, and SSH port per host, simultaneous download and upload of files/directories (using a built-in SCP implementation), again with configurable queue length, the ability to upload and execute a script with one switch, and many other useful options, like additional saving cmd outputs in a separate file for each machine (-d output_dir), or suppressing printing out hosts for which a given command produced no output (-b).
Loadbars is a small script that can be used to observe CPU loads of several remote servers at once in real time. It connects with SSH (using SSH public/private key auth) to several servers at once and vizualizes all server CPUs and memory statistics right next each other (either summarized or each core separately). Loadbars is not a tool for collecting CPU loads and drawing graphs for later analysis. However, since such tools require a significant amount of time before producing results, Loadbars lets you observe the current state immediately. Loadbars does not remember or record any load information. It just shows the current CPU usages like top or vmstat does.
KeyBox provides a way to manage OpenSSH v2 public keys, and can start a Web-based SSH terminal to execute commands and scripts on multiple SSH sessions simultaneously. The authorized_keys file is generated and distributed based on relationships maintained in the application. This allows for centralized management to help prevent public key sprawl. Also, composite terminals or scripts can be created so that commands can be shared across SSH sessions.