TinyUmbrella, a popular solution for saving and submitting SHSH blobs to Cydia has been updated Monday afternoon with support for iOS 6.0.2 and iOS 6.1.
Originally Posted by TinyUmbrella
Alternatively, you can also use the latest version of redsn0w to save your SHSH blobs and submit them to Cydia. Both clients support a Mac OS X and Windows version, so you can be selective over which application you want to use. Also, both clients work with every iOS device.
You can download the latest TinyUmbrella using the links below:
TinyUmbrella for Mac OS X
TinyUmbrella for Windows
Sources: TinyUmbrella via iClarified