You can find the bindings for node.js here. It's very easy to use and available from npm with:
npm install tulind
A high-quality Python wrapper by Tim Cheeseman is available here.
Lua bindings are coming soon. They are already complete and used in Tulip Charts.
Excel VBA, Visual Basic
The Tulip Cell project provides bindings to Visual Basic for Applications, which is used in the Excel add-in. These bindings should also be easy to use for other windows programming languages that can call to a DLL.
Tulip Indicators works well with C++. Just compile the C code; you shouldn't have any problems.