In addition to the core packages that make up bitweaver, additional modules may be installed to provide extra functions on a site. The Bitweaver site list many other packages which can be added. Additionally L.S.Caine Electronic Services has developed a number of specialist packages for specific target customers. Additional modules can also be created quickly if required to fill specific functions not provided currently.

Managing the Contacts system has it's own developing documentation.

In the absence of a good reference to the available modules, the source code repository mirror provides a set of links to notes on individual packages.