| dlr::utilities::Date | As you'd expect, the Date class represents a date, like 2003-03-15 |
| dlr::utilities::FrequencyGoverner | The FrequencyGoverner class allows you to conveniently throttle a loop so that it runs at a specific speed |
| dlr::utilities::LockFile | The LockFile class tries to create a file which is uniquely owned by the calling process |
| dlr::utilities::OptionDescription | The OptionDescription class |
| dlr::utilities::OptionParser | The OptionParser class parses program options |
1.5.4