Hello Slide offers a free slide-solution for lecture presentations. There are many online slide hosting services these days, however Hello Slide offers a point of difference in that it creates text to speech narration of each slide. It also allows slides to be translated into 20 different languages. As much of the content given to students online is in the form a presentations and portable document format (PDF), Hello Slide allows teachers to quickly upload existing documents and then to use the editor to type in the narration for each slide online. This has the advantage of negating the need to record voice overs, which can be time consuming and require additional software such as Camtasia.
The free service makes all presentations public, however for a small monthly cost, these can be made private and allow additional storage. There is also a 50% discount for education. Given the cost of translation, and the problems often encountered by screen readers when presentations use un-friendly elements such as images and tables, Hello Slide offers a quick and value for money option for teachers prepared to offer audio narration to their content, but perhaps would shy away from recording audio annotations.