Geo's  Variants
Starship Spreadsheet - This is an Excel Spreadsheet designed to build starships based on the CT Book 2 starships. The spreadsheet is fairly faithful to book 2 standards.  I only included the listed hulls from 100 tons to 1000 tons and did not factor in unusual engineering sizes.  I felt that for ships over 1000 tons,  you really need to go to a different system.  The spreadsheet will allow you to select the mix of weapons in turrets, select up to seven ship's vehicles, calculates basic crew requirements, and even works out basic ship economics.  The economics presumes a full load of cargo, full roster of passengers.  It also is based on two jumps per month, which is standard for merchants, and does not factor in port fees.
Trade Tables - This is an Excel spreadsheet that I created  primarily for my Star Wars games, but I borrowed a lot of Traveller trade information to fill in the gaps.  Its primary purpose was to break the generalized trade categories of Star Wars into more specific cargoes for those characters who wanted to know more about what they were carrying.  The table breaks the values down into various values such as tons per displacement ton and even has some English units.  It may be of some use to you if you want to know how much  your cargoes actually mass instead of just their volume.