Compact Application Solution Language
The Compact Application Solution Language (CASL) is a programming language used to create applications for the Palm Pilot and PocketPC. It is published by CASLsoft, Inc.
As a language, CASL is similar to PASCAL with object-oriented features. The CASL software development kit (SDK) includes a GUI forms editor, IDE, and compiler. CASL applications can either be run as interpreted applications on the target device (using a small helper binary) or compiled directly to native code (CASLpro). One of its key selling points was that the same source could be compiled to either Palm or PocketPC without changing code ("write once, run either").
In July 2005, CASLsoft announced they were discontinuing support for CASL and releasing it as freeware, with version 4.2 being the last official release. However, a month later WAGWARE Systems, Inc. and Brainyware, LLC announced it was purchasing CASL and continued to release it as commercial software. CASL Version 4.3 was released on 3rd July 2006 and is available as a free download from The CASL Download Page.