I recently discovered Springpad which is a free web based application that lets you save your ideas, things you like, things you hear and the things you see. It is similar to Evernote but compared to Evernote I find it easier to navigate and more visually appealing. Plus currently all the features are free on Springpad unlike Evernote.
You can access it on multiple devices and at the moment it is available for the iPhone, iPad and Android phones.
Check out the official blog for ideas on how you can use Springpad.