The interaction between CALL and Endangered Languages (EL) is an under-researched and under-exploited field. It is perhaps no surprise that this should be the case as CALL in the EL context has to address additional requirements and deal with extra constraints over and above those that prevail in mainstream CALL. This article introduces the topic of Endangered Languages and lists two classifications for Endangered Languages (Terralingua, 2000; Unesco, 1993). It outlines why a language becomes endangered and why it is important to save ELs. It identifies the special constraints that prevail in the EL CALL situation. These constraints determine the EL CALL requirements. In a case study, a software template and suggested syllabus have been developed for the production of CALL materials for ELs. A working example of courseware developed using the template is presented. Finally, the cultural dimension of EL CALL is outlined.