Is there any tools that can generating FBA model from genome sequences or proteome sequences? Suppose I have all sequences of genes or proteins of certain species, are there any free tools I can use to generate a flux balance analysis model out of them?

What I was thinking is more like to annotate all the enzymes based on some annotation method. Then mapping these enzymes to known meta-metabolic networks that we know for instance the meta-metabolic network in KEGG database.
To generate flux balance, one should now the stoichiometric numbers of all the reactions that are taking place, as well as the conditions (that could affect the reactions). I am not sure we have enough knowledge, time and computationally power to do this.

At the moment I'm only aware of a paper simulating the Mycoplasma genitalium cell. But I'm not sure it was worth the effort as I haven't seen replicated or redone with other species, perhaps the model was not accurate enough to be worth it. 

The tools used are here. The licenses are not a standard, but at least they seem free.