Beyond simply auto-saving your work, ForeverSave can maintain multiple versions of your documents as you make changes to them, much as Lion's Versions does. You can even choose how many versions of auto-saved documents are maintained and when they are erased. ForeverSave also allows you to set multiple auto-save operations to serve as an extra backup.
While an iOS-like auto-resume function -- the ability to close an app and later pick up exactly where you left off when you closed it -- isn't built into ForeverSave, its one-click restore option comes close.
ForeverSave may be worth using even in Lion. Apple is making auto-save a priority and giving developers tools to implement the feature. But the company may not make it a requirement for all Mac software (particularly titles sold outside the Mac App Store), and it probably will not be added to previous applications that haven't been upgraded specifically for Lion. Likewise, it remains to be seen if Versions will automatically support all applications and document formats or if developers will need to explicitly choose to support it.
ForeverSave costs $15; a 30-day free trial version is also available.
Another option that offers some Versions-like features is the Dropbox online storage service. Although most commonly used to share and sync files across multiple computers and mobile devices, Dropbox does offer version tracking. That feature isn't included in the Mac Dropbox app but can be easily accessed by logging into your account at the Dropbox website.
There is very limited restore capability connected to a free Dropbox account, but a Pro account offers a feature called Pak-Rat that provides extensive restore or rewind capabilities. Pricing varies depending on the type of account you have and on the amount of space you use.
Apple has always aimed to make file sharing as simple as possible. Bonjour, Apple's no-configuration network protocol, makes it easy to locate Macs on a local network that have file sharing active -- they simply show up (along with any non-Mac computers or file servers) in the sidebar of Finder windows.
That's great, but to share a file with someone, you must know the name of their Mac, that Mac must have file sharing turned on, and you must have access to an account on that Mac (unless the other person has left guest access enabled, which is never a good idea for security reasons). Lion will include a feature called AirDrop that simplifies the process and offers a bit more security.
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