This chapter introduces the use of wikis and written and voice web applications as supporting tools for collaborative writing. It reports on a study examining the processes advanced Spanish foreign language learners engage in while working collaboratively using wikis and chat to complete a writing assignment. Through analysis of students' essays, wiki-based drafts, chat transcripts, and questionnaire responses, it was observed that students maintained an interest in their essays' accuracy as well as a focus on global rather than local aspects. In addition, the combination of wikis and chat provided students with an environment in which to state a clear thesis, provide supporting evidences, and refine the organization of the essay in a manner often missing in individual work. The authors expect that the benefits observed when using social web applications while working collaboratively will provide more evidence for pedagogical shifts that will help students become better writers in their second language.