JSMX
JSMX is an Ultra Lightweight - Language Agnostic - Ajax Framework. It is by far the easiest way to integrate Ajax into any Web Application. What separates JSMX from most other Ajax Frameworks is that the JSMX API runs entirely on the client and has no Server Side Components to install. Given this fact plus the fact that you can pass back JavaScript, XML, JSON, or WDDX makes JSMX a truly Universal Ajax API.