Most dictionaries, glossaries and indexes can be turned into Lexicompatible dictionary modules. Even some of the bibliographic dictionaries will work, as long as they don't require a large number of lookup keys (for specialized multi-key dictionaries, a relational database would be more appropriate than Lexicographer).
By the way, it's not often we endorse a company online, but we've found that Powell's Technical Book Store and general book store (a couple of blocks away) in Portland, Oregon, to be exceptional! It has dictionaries on almost every shelf in the store, shelves that reach to the ceilings, and more electronic reference book ideas than we could implement in a dozen lifetimes!
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Quicklink to University of Washington Library lists hundreds of dictionaries, glossaries and indexes, many of which would make excellent Lexicompatible products.
There are some interesting online dictionaries whose authors might be willing to create a version (or grant rights) for use on personal computers. Since they've already done most of the work, conversion would be straightforward, to Lexicompatible format. Take a look at this online dictionaries site.
Technical/Scientific
Coming soon.
Historical/Scholarly
Coming soon.