The LuaTeX project is related to other projects in the TeX community. First of all it follows up on the pdfTeX project which over the past years has received some funding from user groups and individuals and companies.

Programming LuaTeX has been funded by:

Occasionally additional donations are made. Thanks to this sponsorship Taco could spend company time on merging the pdfTeX and Aleph code base and writing the necessarry extensions.

Programming the associated MetaPost library is funded by several user groups:

The necessarry Open Type Fonts are provided by the TeX Gyre project:

The LuaTeX and MPlib project are coordinated by Taco Hoekwater (Elvenkind) and Hans Hagen (Pragma ADE). They are dedicating a considerable amount of company time to the development of LuaTeX. Per 2014 Luigi Scarso will be responsible for MPlib coding.

Of course, TeXies around the world put lots of time into these developments as well. Thanks to them for testing and supporting the team.

Funding is only possible because the user groups have members. In addition to journals, distributions (TeX Live), meetings and mailing lists, supporting projects are an important effort of local user groups (LUGS) and TUG. The international user group has a web page for donations

If you're a happy TeX user and not yet a member of a usergroup, consider becoming one. You can find the home pages of user groups here.