How do I calibrate colors without extra hardware, like dccw.exe on Windows?

Colors on my monitor are too yellow.

On Windows 7, there is the color calibration tool accessible from the Control Panel, or as dccw.exe.

I'd like to calibrate color without extra spectrometers are other special hardware. Note that dccw does this by showing you a series of photos and asking you to adjust colors so that the photos match a certain description (e.g., so that the difference between two shades of black is just barely visible, or that some stripes appear distinct).

How can I do that in Ubuntu?

Using Asus laptop, Xubuntu 13.10

You can use gnome-color-manager to do the same in Ubuntu. For Xubuntu have a look here