PowerShell has this; all cmdlet parameters are parsed by the PowerShell environment, so you don't have to write argument parsing code over and over; parameters

PowerShell has this; all cmdlet parameters are parsed by the PowerShell environment, so you don't have to write argument parsing code over and over; parameters to cmdlets are a standard form with many using the same common names where it makes sense. Because of that design they are long and readable words but tab completable, and ctrl-space will bring up a menu of available matches starting with what you've typed so far.