The plugin you mentioned isn't on the community. Anyway, it's already outdated.

You can use other plugins to get what you want. It won't be exactly like Tosh, but you've no other way.

Look at Embed Extender.

This plugin allows you to insert existing objects on the site.

With the bundled plugins Embed and File you can embed the external files.

But you can only do this with existing entities ('blog', 'page' etc).

You need to create a new entity (object) (e.g. 'presentation') to do what you want.

You may need the developer's help to create a custom plugin.

If you don't want to hire a developer, or you don't have enough knowledges, you can use in addition the bundled plugins Blogs or Pages, or Static, Pages Tools.