BatChmod for Mac lets you change file permissions more quickly without using the Terminal, by checking or unchecking boxes corresponding to different levels of permissions. It's a practical app but its interface offers room for improvement.
Despite its rather dull interface, BatChmod for Mac lets you import files with ease. To get started you need to click the "File" button that brings up a Finder window for selecting the file whose permissions you want to modify. Once the file is selected, drop-down boxes automatically display the owner and group, and you can check or uncheck boxes for each of the permissions. For those unfamiliar with the types, the short labels of R, W, and X will likely be a mystery; more information should have been provided, i.e. R = read, W = write, and X = execute. Additional check boxes are also available to modify other properties, but they are also poorly labeled and even less clear.
If you want a quick way to change a file's permissions without using the Terminal, BatChmod for Mac can help you. However, if you never used Unix nor Linux and are not familiar with the chmod command you'll have to spend some time figuring out what those unnamed shortcuts mean. While this isn't a bad app by all means, it's not the most intuitive one, either -- unless you are an advanced user and know exactly what you're doing.