Agave is described as 'Have you ever been re-finishing a room in your home... Or been working on a new website and not been able to find colors that go well with each other?' and is an app in the Photos & Graphics category. There are more than 10 alternatives to Agave for a variety of platforms, including Windows, Mac, Online / Web-based, Linux and iPhone. The best alternative is Just Color Picker, which is free. Other great apps like Agave are gpick (Free, Open Source), gcolor2 (Free, Open Source), Instant Color Picker (Free) and ColorMania (Free).
gcolor2 is a basic colourpicker utility that allows you to select any colour on your screen, and, well, grab it's colour. It also allows you to save the colour you create to a file, which shows up as a list in the application.
ColorMania is a colorpicker for Windows. It's the perfect solution for previewing, identifying, testing and organizing color values. It can be a very difficult job to get your colors right for a unique or appealing design.
With the pipette you are able to edit, convert and pick up colors from your screen. Pipette also supports a lot of standards or color models (RGB, CMY, CMYK, HSV, TColor and XYZ0). Color models are nothing but theoretical descriptions of colors using certain numeric values.