Hodie prints the current date and time to stdout in Roman numerals, with grammatically correct Latin. Complete with Id., Kal., Non., pridie, postridie, bis, and all the other nice annoyances. As an option, it even provides you with current date according to Roman calendar -- that is 'ab urbe condita'; after Rome was built.
ICU provides a Unicode implementation, with functions for formatting numbers, dates, times, and currencies (according to locale conventions, transliteration, and parsing text in those formats). It provides flexible patterns for formatting messages, where the pattern determines the order of the variable parts of the messages, and the format for each of those variables. These patterns can be stored in resource files for translation to different languages. Included are more than 100 codepage converters for interaction with non-unicode systems.
ByteName is a tool that for each byte of the input prints a line consisting of the byte offset, the byte in hex, octal, binary, and decimal, and its description in a selected single-byte encoding. A command line flag suppresses printing of lines corresponding to ASCII characters, which is useful for locating stray non-ASCII codes. It can also generate a chart for a specified encoding or, for a specified codepoint, generate descriptions in all known encodings.