Redland language bindings
- SWIG not an IDL
- Perl, Python, C# - complete native APIs
- Ruby - nearly up-to-date native API
- PHP - bare API
- Java - out-of-date native API
- Tcl - bare API
- New 2004-09: OSX Objective-C just announced, developed separately.
Perl, Python, C#, Ruby and Obj-C APIs all have test suites