-This is the GRAS (Grid Reality And Simulation) library.
+This is the SimGrid project.
-This is a communication wrapper so that the same code can run at the same
-time in the reality using sockets and in the SimGrid simulator. See
-doc/GRAS.design for more info.
+There is at least 5 sub-projects in the tree:
+
+ - XBT: eXtended Bundle of Tools (low-level toolbox: logging, datatypes).
+ - SURF: a SimUlation aRtiFact. This is the simulation kernel.
+ - MSG: originally MetaSimGrid, MSG is a simple distributed application
+ simulator.
+ - GRAS: Grid Reality And Simulation (message passing API with two
+ implementations allowing to compile programs on top of the
+ simulator or for the real life without code modification)
+ - AMOK: Advanced Metacomputing Overlay Kit (high level toolbox; Grid
+ application elements such as distributed database, topology
+ discovery service, and so on)
+
+More informations are available in the doc/ directory.
+
+In particular, don't forget to read the FAQ in there. It probably contains
+the answer to your question ;)
