The temperature trend calculator shows a warming trend in all data sets in 19 years. (climate-skeptic.com)
Kevin Cowtan has a neat online trend calculator for all current global temperature data series. (realclimate.org)
The laughably named «Skeptical Science» site (a climate / warming doomsday site) provides a a handy trend calculator, which confirms whether a linear temperature trend is actually «real» - or in statistical parlance, is the trend «statistically significant» or not, using the widely accepted 95 % confidence interval test (2 sigma). (c3headlines.com)