aMap

aMap - great for debates and arguments- can embed into your website or blog.

iPadio

iPadio- ipadio allows you to broadcast from any phone to the Internet live. Phone blog, collect audio data, record and update the world, or simply let your mates know what you're doing - ipadio is integrated with Social Media & Blogging platforms.
Great alternative to Gabcast!

Example:

exploratree

exploratree - Exploratree is a free web resource where you can access a library of ready-made interactive thinking guides, print them, edit them or make your own. You can share them and work on them in groups too. Click here to see one of the many pre-made templates.