WhatsApp, arguably the most popular cross-platform chatting solution, has just gone free on the App Store. We're not sure whether the move is part of the upcoming iOS subscription switch or if there was a change of heart.
Either way, we're not complaining. Previously a 99-cent download, WhatsApp for the iPhone and iPod touch is now provided free of charge (jump past the fold for the fine print).
In addition, the app's been updated with the much-needed ability to back up your chats to iCloud so you don't loose your chat history upon reinstalling WhatsApp. Other changes in WhatsApp 2.10.1 include support for URL schemes and the ability to send multiple photos at the same time...