Eclipse IDE can be used for LISP programming, other than Emacs, obviously.

1. Download Eclipse Classic IDE. In order to run Eclipse Java runtime should be installed. There are both 32 and 64 bit versions of JRE and Eclipse. Choose them depending on the OS that you use. Extract the archive.

2. Download cusp plugin depending on the OS and extract it. (Alternate link).

The folder structure is as below for windows version.

cusp_win32
├── features
└── plugins

3. Copy the contents inside the features and plugins folder of the cusp_win32 to the corresponding features and plugins folder which is present inside the eclipse-SDK-3.5-win32\eclipse folder.

Now open the Eclipse IDE and under the Window > Open Perspective > Other... we will see Lisp. Choose it, and now we have a full blown Lisp IDE.

A tutorial on using Eclipse for Lisp project

This is a screen recording of the original tutorial as swf I created for the team for my college main project. Later we decided to not do it in Lisp.