The best replacement for netsim is routersim.

The best alternatives to netsim are rated as following:
★★★★★  routersim
★★★★  gns3
★★★★  packet tracer
★  cisco packet tracer

Your alternative for netsim is not listed? Suggest!


No companions for netsim have been suggested so far.
You have in mind a companion for netsim and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of netsim in all years. Click on graph for more.
netsim
routersim
gns3