Hi,
I don't know anything to PD for now. I'm a French programmer and guitarist playing (among others) in a Pink Floyd Tribute band. Our shows can be pretty complex. Using many keyboard sounds, guitar sounds, settings on our XR32, playing audio samples, playing videos... As we don't play using a click track, all of these actions are done by each of us at the right moment. It works, but sometimes it gets "tricky"; we have to play the right chord and sing in tune without forget to start the sample and change the guitar sound... It can disturb us from our primary goal; play good music!

So I'm looking for tool that could handle many (all?) of those things and be controlled in a very simple way. I imagine it like this; I would define the "actions" that have to be done (send program changes to differents hardware, play an audio sample, play a video, send OSC to the XR32...). Actions that have to be made at the same time would be grouped in a "script". And these scripts would be ordered in a "playlist". Then, when pressing a single (midi) footswitch the scripts will be fired sequentially at the right moment.

So is Pure Data is the right tool to make this? If it is not do you know some tool that will do it?

Well, there might be some program around that does what you guys want without needing to deal too much with programming. Since you're a programmer though, you shouldn't have problems with programming concepts. Still, Pd is a visual programming language that quite some "traditional" programmers don't like.
Sure Pd can do what you want, but you have to learn a bit of Pd programming before you can actually make what you want.
Cyrille Henry has made a very nice abstraction for cue lists. You can find it here http://www.chnry.net/ch/spip.php?article291

Haven't used it myself, but it looks pretty good for this kind of stuff.

Thanks for the quick reply. I will give a look.
But if there so "out of the box" software that you know I'm interested. Would you have names in mind?

Actually I don't know any software that does what you want, I just suppose that there might be something around. I'm using Pd for almost all the stuff I do...

@g.lolo3 As @alexandros says..... it can all be done in Pure Data, and "reasonably" easily. Midi / osc can be integrated and network connections too, so you can automate what you need to do.
You might find that it is a "good fit" to the way that you think, especially if you enjoyed "data-flow" charts when you started programming.
Otherwise, if you could find a good FOH sound engineer....... musical..... "just knows" where he /she is in the song.... and who is interested in automating the stuff?????
That would take away all of the "button pushing" requrements from the musicians.
Like you, I had not heard of Pure Data when my band asked for a complete wireless monitor system.
It took be 3 days to build it in Pd. It is much improved now.... but 3 days (hard learning) was enough to have it working.
You will get enormous amounts of friendly help on this forum. Beware though..... it is addictive!
David.

https://www.iannix.org/