I love QuickLook, it's the fastest way to peak and copy from files. But not all file's open in QuickLook and text files need the .txt extension for QuickLook to work. Lucky you can extend QuickLook with plugins and QLStephen has the excellent QuickLook plugin that lets you view plain text files without a file extension. Files like: README, INSTALL, CHANGELOG, INFO etc...
And even text files with extensions like .info .install .inc are readable! Great work :) http://whomwah.github.io/qlstephen/Read more about OS X QuickLook text files without an extension
Quick Look is one of OS X's best features. Hit the Spacebar when you select a file, and you'll see a preview of that file without having to open up an app. It's great, but you can't select any text when you're in the preview.
You can use the following terminal command in the OS X terminal app to enable text selection in Quick Look:
Download it here, unpack,
- copy the BetterZipQL.qlgenerator bundle to your /Library/QuickLook folder
- restart the finder, or reset quick look in the terminal > qlmanage -r Read more about OSX, Quicklook Plugins?