It also improves navigation among Spaces by letting you configure a virtual map of where spaces are in relation to each other, and it offers hot keys for common Spaces tasks, such as adding or removing Spaces and showing or hiding desktop icons in a Space.
Hyperspaces works with OS X Leopard or later and costs $13; there's also a free demo version that lets you customize up to three Spaces.
SaneDesk is another Spaces enhancer that allows on-the-fly creation and deletion of Spaces. It supports an unlimited number of Spaces, each of which can be customized with its own desktop picture, set of desktop icons and Dock (complete with unique Dock items and on-screen positioning). SaneDesk works with OS X Leopard or later and costs $16; a limited free trial version is also available.
Switché is a Snow Leopard-only utility that builds on the Exposé feature. It uses Apple's Cover Flow feature to show large, smooth 3D previews of running apps, windows or Spaces, allowing you to switch among them in an intuitive manner (similar to the swiping feature of Mission Control). Switché costs $8 and offers an unlimited free trial version.
Auto-save and Versions
Auto-save isn't a new concept, nor is it specific to iOS. Many applications offer an option to either automatically save files at a set interval or to auto-save a backup (without changing the original file) that can be accessed if the application crashes.
Lion taps into that auto-save functionality in a new feature called Versions, which lets you view all past iterations of a document or other file that you've made changes to. In a way, it's an extension of Apple's Time Machine, which allows you to locate and restore files from a backup. Time Machine comes in very handy when you want to get back a file you've deleted or find an earlier version of a file before you made modifications to it.
However, while Time Machine makes hourly backups of each document, it only keeps them for 24 hours; it permanently saves only one backup of each document per day. Versions, on the other hand, saves and keeps a version each time you open or save a file. If a document is open for an extended period of time, a new version is stored every hour that it's open.
There are a couple of ways to get similar features right now.
For applications that don't offer an auto-save feature, there's ForeverSave, a utility that can provide auto-save features systemwide to any Mac running OS X Leopard or later. You can select which applications can auto-save and when they auto-save (the default being anytime you switch applications).
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