GNU parallel is a shell tool for executing jobs in parallel locally or using remote computers. A job is typically a single command or a small script that has to be run for each of the lines in the input. The typical input is a list of files, a list of hosts, a list of users, a list of URLs, or a list of tables. If you use xargs today you will find GNU parallel very easy to use, as GNU parallel is written to have the same options as xargs. If you write loops in shell, you will find GNU parallel may be able to replace most of the loops and make them run faster by running several jobs in parallel. GNU parallel makes sure output from the commands is the same output as you would get had you run the commands sequentially. This makes it possible to use output from GNU parallel as input for other programs.
Vimv is a utility to help rename various files at once using a text editor. It opens the list of files in a directory inside a text editor (vi by default). Then, any changes made in the editor will be reflected in the filesystem (the files in the directory will be renamed to the names saved in the editor).
Kloxo is a lightweight and powerful Web hosting panel that has been in development since 2002. It was formerly known as LxAdmin. It allows for adding customers, resellers, and wholesale resellers with few clicks. Clustering functions are also built in, so you can expand and add servers whenever you need. Migrating customers between servers is easy and automatic, making it the most extensible panel to date. The services installed by default are Apache, BIND, MySQL, Pure-ftpd, Qmail, and Bogofilter. You can also switch between Apache and Lighttpd, BIND and djbdns, Bogofilter and Spamassassin. All configuration files are converted automatically in the process.
ribbil is a wireless network manager designed for power users. It purposes is to provide an easy way to connect to wireless networks from a console under GNU/Linux, using wpa_supplicant and wireless tools. It can be used through the command line directly or through its curses interface.
Clicco is a tool for constructing command line commands based on saved configurations. It is ideal if you have difficulty remembering the exact commands, arguments, or argument values for various situations, as you can save commands with various argument choices for future use along with a description.
FEHASHMAC is a collection of publicly known hash algorithms integrated into a command-line utility. Currently 42 hash algorithms belonging to 12 algorithm families are supported, including the five SHA-3 finalist contributions, plus HMAC for each algorithm. FEHASHMAC contains a set of over 540 known test vectors and results for each algorithm such that the correct implementation for each hardware platform and compiler version can be directly verified. FEHASHMAC supports bitwise hash calculation for algorithms with available bitwise test vectors. Currently this applies to the SHA algorithms: sha1, sha224, sha256, sha384, sha512, and to the five SHA-3 finalists. The so-called Gillogly bitwise input has only been tested for sha1, but is also implemented in the SHA-2 hashes. Bitwise hash calculation is also supported in sha512-224, sha512-256, and whirl, but there are no bitwise test vectors available. FEHASHMAC can also calculate hashed message authentication codes (HMAC).
s6-portable-utils is a set of tiny general Unix utilities, often performing well-known tasks such as cut and grep, but optimized for simplicity and small size. They were designed for embedded systems and other constrained environments, but work everywhere. Other sets of small utilities are usually system-specific; for instance, the (otherwise excellent) BusyBox project only works on Linux.