Joseph Keller, at iMore writes:
AgileBits has announced that they're upcoming iOS 8 extension for 1Password is now supported by over 100 apps. The updates for the apps supporting the extension, as well as 1Password itself, will be available when iOS 8 ships later this year. In the meantime, AgileBits has previewed twenty of the apps that will ship with support for the extension.
We can't share the full list of developers yet (we just cracked 100!). But we can show you nearly 20 apps that are already working on integrating 1Password's iOS 8 App Extension for fast, one-tap logging in and even updating your passwords!
Extensions are going to be huge.