Several incarnations of vessel management products by The Generalist have been in distribution since September, 1997.
(Presented in reverse order of publication below:)

Vessel Management System Single Vessel Edition (SVE)
VMS (SVE) is built on the foundations of VMS Pro and is intended for the owner/operator (although suitable for many vessel types) who does not need a full back office business database system. Attractively priced at $99.00 and available for purchase online.

Vessel Management System Professional (VMS Pro)
A significant technical upgrade to Fleet Management system, VMS Pro is a back office solution for multiple vessel operations, vessel owners, MegaYachts, marina operators, charter businesses, working vessels, etc., and includes all features of FMS (see below) with many technical upgrades, significantly improved code base and multiple user/network capability.

Fleet Management System (FMS), retired
Original Generalist solution for multiple vessel database/business back office system intended for vessel owners, MegaYachts, marina operators, charter businesses, working vessels, etc. Because of this program's relatively short lifetime all FMS owners may acquire an upgrade to VMS Professional at no charge.

Vessel Management System (VMS, original version published Q2, 1998), retired
Over one thousand installations. In 1998 VMS began a distribution agreement (still current) with Nobeltec Software (then Nautical Software, Inc.), now owned and operated by Jeppesen Marine.

Vessel Information Manager (VIM), retired
First published September, 1997. Over one thousand installations.

All versions are written in Microsoft Access and conform to strict technical standards for installation and backward compatibility (click to read temporary Vista restrictions). Although Microsoft Access is a common application (and the most ubiquitous database on the planet), VMS is installed in a Runtime environment, rendering it independent of all other versions of Microsoft Access and Microsoft Office that may be installed on your computer (click to read temporary Vista restrictions).

All installations are built with the WISE install system. Runtime and security templates are provided by Sagekey Software.

All current versions of VMS are supported free of charge, with updates published regularly.

The author is an active vessel owner (currently a Nor'Sea 27'), holds a USCG Master's Certificate (since 1985) and is a working computer professional.