The document discusses several synchronous communication tools including Voki, Second Life, Wimba, Google, Skype, Adobe Connect, and Moodle. For each tool, it provides a brief overview of potential uses and limitations. For example, it notes that Voki could be used for vocabulary review but may not be suitable for older students, while Adobe Connect allows for more collaboration than Skype but has a higher price point. Overall, the document considers how different synchronous tools could be applied in an educational setting.