Apple will be giving us a sneak peak at iOS 6 – the future of iOS at the WWDC 2012 Keynote tomorrow.

We’ve compiled the list of iOS 6 features based on the rumors that have been circulating ahead of the event.

All-New 3D Maps App:

Apple is widely expected to step up its rivalry with Google by launching an all-new 3D Maps App developed in-house. Google currently markets the Google Maps Navigation app as one of the unique selling points of Android-based smartphones. Apple will finally have something to counter that claim.

The new maps app is rumored to offer a much cleaner, faster, and more reliable experience. One of the major features of the Maps app is a powerful new 3D mode. Apple has apparently used technology from C3 Technologies, which it acquired last year to offer beautiful, realisitic graphics based on de-classified missile target algorithms. According to people who have seen it, the new maps functionality will “blow your head off”.

Facebook Integration:

It looks like Apple and Facebook have patched things up as Tim Cook hinted at the possibility of Facebook integration coming to iOS 6 earlier in the week at AllThingsD’s D10 conference.

According to the rumors we’ve heard so far, the integration will be similar to Twitter’s Integration in iOS 5. As one would expect, sharing will be one of the major features of the integration. It will also mean that third-party apps and Facebook integration will be a lot more seamless.

Siri:

Apple’s personal assistant feature that is currently available exclusively on the iPhone 4S, may be coming to the iPad. However, it is not clear if it will be available on the third generation iPad or also on iPad 2 and/or iPad 1. Check out the mockup of the Siri’s user interface on the iPad.

iCloud:

Apple is expected to announce a number of improvements and new features for iCloud:

• Apple may add photo-sharing feature and video syncing capabilities to its iCloud service, which will be available in iOS 6. It will allow iCloud users to share sets of photos with other iCloud users and to comment on them.
• iCloud beta site revealed that Apple plans to add Notes and Reminder web apps to iCloud.com in iOS 6.

iCloud Tabs:

This feature will allow iCloud users to view a list of tabs opened in the Safari web browser across multiple iOS devices and Macs. When the iCloud Tabs button is clicked on an iOS 6 device (or Mac), all the tabs opened on each device will be shown in a synchronized list. Users can quickly pickup individual tabs that they were working on across their Apple devices. The iCloud Tabs button on the iPhone and iPod touch is hidden behind the Bookmarks toolbar.

Mail VIPs:

This is one of the OS X Mountain Lion features that may be coming to iOS 6. Mail VIPs puts a star next to emails received from a specified group of people. VIPs assigned to iCloud accounts will sync with iCloud across iOS devices and Macs.

Do Not Disturb toggle:

This is another OS X Mountain Lion feature that may be coming to iOS 6. The Do Not Disturb toggle will allows users to block incoming alerts and banners. The Do Not Disturb toggle is stationed like the Airplane Mode button in the Settings app as seen in the mockup below.

Silver-Colored Theme:

The apps that come pre-installed with your iOS device haven’t changed much in both the look and functionality department, since the launch of the original iPhone in 2007.

But Apple may be gearing up to make at least some subtle changes in iOS 6 such as changing the color scheme used in the pre-installed apps. It looks like Apple will switch from the blue-colored theme (a black bar along the bottom and a blue bar along the top) to a silver-colored theme (silver bars) in iOS 6.

Revamped App Store, iTunes And iBookstore apps:

iOS 6 may also feature redesigned iTunes Store, App Store and iBookstore.

In addition to these features, we’ve also heard that Apple is not planning to make any major changes to the Home screen or introduce Android-like widgets.

Some other points related to iOS 6:

• It has been confirmed that Apple will call their next generation mobile operating system – iOS 6 and not the new iOS.
• iOS 6 is internally codenamed Sundance (after a ski resort)
• It will be interesting to see if iOS 6 will be compatible with iPhone 3GS. We expect Apple to discontinue iPhone 3GS later this fall when it launches the sixth generation iPhone, so it is quite possible that iOS 6 won’t support it. Update: The leaked iOS 6 download links reveal that Apple may be dropping support for the original iPad (iPad 1) and the third generation iPod touch.

We expect Apple to seed developers of iOS Developer program with the beta version of iOS 6 after the Keynote. Apple is expected to release iOS 6 to the public later this fall couple of days before the launch of the next generation iPhone.

Well, that’s what we’ve heard about iOS 6 so far. What’s on your iOS 6 wish list? Let us know in the comments below.

Also check out our iOS 6 wish list.