Changes are coming soon for how third-party applications can use Twitter’s application programming interface (API), the software tool an app uses for accessing Twitter content. Despite a warning in June that changes were coming, the switch is drastic enough to raise debate from software developers and critics. Instapaper developer Marco Arment said the changes will make him think twice before adding any Twitter-based features to his software. Others argue that at least Twitter is giving clear guidance to developers about how to use Twitter. Read the full story at PC World.