After adding support for OS X 10.9 Mavericks in its version 5.0 release, TinkerTool 5.1 from Marcel Bresink is now sandboxed for better security. The under-the-hood customization system utility also does away with the Login Items pane as it’s no longer useful for Mavericks, differentiates between the actual Lucida Grande typeface and the new screen system font introduced with OS X Mavericks, reinstates the preference setting that enables you to copy text displayed by Quick Look (for 10.9.1 and later), and reduces storage space used by the preference reset feature. While the latest version of TinkerTool requires 10.9 Mavericks, Bresink continues to offer older versions of TinkerTool for those running previous big cats, all the way back to 10.1 Puma. (Free, 3.9 MB, release notes)
Expand Finder Columns Quickly
Column view in the Finder is great for navigating through your disk's hierarchy, but the columns often aren't wide enough to show the full names of all the files. To expand a column to a width that will show all file names in their entirety, double-click the handle that you would normally drag to expand or shrink the column. To expand all the visible columns to that width, Option-double-click the handle.