AirReg
Lookup airplane details by entering its registration "number".
This software is also available for off-line use:
by Yours Truly
Like the online version it will first try Airport-data.com's API to lookup the registraion, but unlike the online version, it can also use add-ons for locally stored databases.
I think it is a pity to lose the romantic side of flying and simply to accept it as a common means of transport....
Amy Johnson