Question: Just like the newly presented iMessage but instead of just between iOS devices, with the Mac too.

I've looked at Handoff. It can only send links to the iPhone from the Mac.

I've looked at Droplr. It requires public sharing on a Twitter account. Not what I want.

I've been using email and have been recommended Evernote. But these solutions require a document that I must create, wait to sync, and/or later delete to free up clutter. I just want to send a quick message.

I just want an app/application pair that can quickly share links, notes, and pictures between devices, like iMessage.

Does what I desire exist?

Answer: 
Apple OSX Mountain Lion has been announced, it includes a few of the iOS apps on the mac desktop such as Notes, Game Center, reminders, twitter and message.

<http://www.apple.com/macosx/mountain-lion/>
RE: ".. I just want an app/application pair that can quickly share links, notes, and pictures between devices, like iMessage."

There is nothing I know of that does everything you require as simply as iMessage, but I can give you my solution for this (since this is something that I also require).

For quickly sharing links & notes between iOS devices and a Mac (as well as PCs running Windows or Linux), I use [simplenote](http://simplenoteapp.com/).

You can create a free account and then start using simplenote on all of your devices, simply through their web login (you can also buy a neat simplenote app so that you can store your notes offline, when you are not connected to the internet, but this is optional).

For quickly sharing photos between iOS devices and a Mac, I use [instagram](http://instagr.am/).

Finally, for when I don't want to write a note to myself, but just simply take note of a particular web site (or URL), I use [instapaper](http://www.instapaper.com/) (which is free a web based service that you can use, as well as an optional iOS app that you can buy).

Please note, since instagram and simplenote both have published their web api's, there are a number of instagram and simplenote clients that you can install on your Mac (again, this is optional, since you can just use their free web based service).

The following are optional apps you can install on a Mac :

For the Mac, I use [nvALT](http://brettterpstra.com/project/nvalt/), which syncs my simplenote notes without needing to use a web browser to login to their web site.

Also, you may find [Screenstagram](http://www.barbariangroup.com/software/screenstagram) a nice instagram screen saver on the Mac.

For a full fledged instagram client, try [instaDesk](http://mac.appstorm.net/reviews/internet-reviews/bring-instagram-to-your-mac-with-instadesk/), or [Carousel](http://www.macworld.com/article/159826/2011/05/carousel_instagram_os_x.html).

Hope this helps.