IEx vs. Synapsis

[Iluvatar]

Hey!

Sorry if I do something stupid, but I don't understand the differences between sinapsis and IEx.

Is one of them a part of another or is IEx older than Sinapsis or was one of the project layed down?

Wich one should I use?

Thanks for your answers =)

Ilu

edit: oh...ok... the link to download sinapsis is dead... so I will try IEx... but it would be interesting to know whats the matter with those two programs