Timeline and Graphing Tools

Timelining

Xtimeline
Timeline Maker (Teach-nology)
ReadWriteThink Timeline
Timeglider
TimeToast
capzles
Timelines.com
Timerime
Dipity

Graphing

ThinkFree - Graphs, spreadsheets and presentations
Graphsy
Create A Graph
e-Tutor Graphic Calculator - Graph equations
FooPlot - Online plotting tool
PDF Pad - Create and print graph paper
Swivel
GoogleCharts API