AwesomeTTS makes it easy for language-learners and other students to add speech to their personal Anki card decks.
The website provides documentation and help for current and prospective users of AwesomeTTS, in addition to hosting some limited APIs for use from the add-on (e.g. update mechanism, relay access to some third-party APIs).
AwesomeTTS is free and open-source software. First-party web code is released under the GNU AGPL v3.
The speaker icon/logo used on the website is a high-resolution version of the one bundled with Anki. The icon is originally from the Oxygen Icon Theme, which was also originally released under the GNU AGPL v3.