In spite of a critical turn in technical communication research, discussions of software documentation continue to forward a singularly instrumental understanding of how these types of texts are composed and consumed. Using work on multiliteracies, I illustrate how analysis of the competing evangelisms of software that occur in programming culture unveils the ways in which documentation, like code, is ideologically encoded. Attention to the evangelisms of software facilitates critical literacy and, consequently, a richer rhetorical literacy. Such literacies are necessary for composing effective software documentation and identifying how the ideologies of software and its documentation intersect with the nationally-situated cultural values in which these technologies and texts are developed and used. To illustrate this complexity, I offer examples of the intersections between free and open source software evangelisms and the national-as-local contexts of the United States, Brazil, and China.