Generate timeseries data
ATM I know of TSimulus and TimeSynth to generate data programatically in a controlled manner (instead of generating random data).
TSimulus allows to generate data via various generators.
TimeSynth is capable of generating signal types
Harmonic functions(sin, cos or custom functions)
Gaussian processes with different kernels
    Constant
    Squared exponential
    Exponential
    Rational quadratic
    Linear
    Matern
    Periodic
Pseudoperiodic signals
Autoregressive(p) process
Continuous autoregressive process (CAR)
Nonlinear Autoregressive Moving Average model (NARMA)

and noise types
White noise
Red noise

If you are looking for a graphical way to generate data TimeSeriesMaker is the only tool able to do this.