Farey Fraction Number Line (Split in Two)
A Farey Sequence consists of all fractions between 0 and 1 with denominator less than or equal to a particular value. This applet shows Farey Sequences on a number line that's split at 1/2. Note that past denominator 9, the labels won't fit.
To see a number line that isn't split, go to http://www.geogebratube.org/student/m12717.
To see an applet that shows visual patterns in the Farey Sequences with denominators up to 75, go to http://www.geogebratube.org/material/show/id/12780.