Lemonade is a Javascript template built using an obsolete version of Framer. A frowned upon solution in the modern world, but hey, it has worked for me in niche situations, and it may help someone else too.

Why should I use this?

You shouldn't. You should use a modern prototyping tool if that's available to you. These are great options: Framer, Principle, ProtoPie, and Origami.

What's Lemonade for then?

There are niche scenarios in the industry that hand you lemons:

• Companies don't have licenses of prototyping tools.
• Prototyping tools are not IT approved.
• Prototyping tools are available, but the online-sharing portion is not approved to use.
• The work is so secretive that it cannot be uploaded to vendors' servers.

First, try everything else.
And then, if you're still curious, give this one a try.