As we've used SmartDashboard 2.0 (SFX) over the last two years, we've found that the built-in graphing utility just isn't good enough, so we made our own version.
It can be found at
https://github.com/Nashoba-Robotics/SmartChart
Advantages:
- Graphs based on time, instead of based on when a new data point is sent to the dashboard
- Graph can be reset
- Graph can show multiple data sets simultaneously, by sending SmartDashboard a string with the format "[var1]:[var2]:[var3]". Eg. "1.0:2.3:5.6"
- Graph can export data to a csv file in the location USER_HOME_DIRECTORY/SmartDashboard/VARIABLE_NAME.csv
To install, download
the most recent release, and move the .jar to your USER_HOME_DIRECTORY/wpilib/tools/plugins/ folder.
BONUS: In the repo, there's also a SmartDashboard USB Camera extension that flips the image upside down, so if you have an upside-down camera on your robot, the output is more useful for your drivers.
Team 71: So good at Strategy they already have figured out next years game before the GDC has even met. - IKE [more] 
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