Brian Taylor Software

RVal 

RVal helps you select the best pairs of values to produce a given ratio, difference, or connect in series or parallel to produce an exact value. It will find the nearest preferred value or the one required in parallel with an existing value.
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MailUtils 

MSmail postoffice administrators can use it to search for wasted disc space occupied by emails that can be deleted or users that are not collecting their email. It can also be used to identify the owner of every .MBG file & create other useful lists.
e-mail email msmail postoffice utilities