Watermarker (OS X 10.7 and later, US$7.99) offers a functional way to apply image watermarks. For small batches of images without a lot of customization demands, this app probably does what you need it to.
The features are basic: you add text, you add a logo, you save the new image. The app offers standard options like transparency control and color selection. There's also a button that inserts the (C) character for you.
Importantly, you can save your choices as presets, so you're ready to re-use already desi
