Allegro CL is described as 'The most powerful dynamic object-oriented development system available today, and is especially suited to enterprise-wide, complex application development. Complex applications with billions of objects are now made easy with Allegro CL 9.0' and is an app. There are more than 10 alternatives to Allegro CL for Windows, Linux, Mac, BSD and Self-Hosted. The best Allegro CL alternative is Racket, which is both free and Open Source. Other great apps like Allegro CL are Hy, Guile, MIT Scheme and Steel Bank Common Lisp.
LispIDE is a basic graphical shell for several Lisp and Scheme implementations available for Windows. LispIDE seems to work with: Corman Common Lisp, Steel Bank Common Lisp, CLISP, Gnu Common Lisp, Gambit Scheme, Bigloo Scheme, SCM Scheme, Arc, newLISP, OpenLisp, Clozure Common...
femtolisp is a simple, elegant Scheme dialect. It is a lisp-1 with lexical scope. The core is 12 builtin special forms and 33 builtin functions. It is fast, ranking among the fastest non-native-compiled Scheme implementations.
femtolisp is the most popular Self-Hosted alternative to Allegro CL.
