The best replacement for labview is matlab.

The best alternatives to labview are rated as following:
★★★★★  matlab
★★★  labwindows
★★★  simulink
★  measurement studio
★  multisim
★  vee
★  labwindows cvi
  cvi
  dasylab
  robotc
  scada
  hp vee
  agilent vee
  teststand

Your alternative for labview is not listed? Suggest!
Speaking about labview, one probably shouldn't forget about plc.

Other search terms related to labview and their ratings are:
★★★★★ plc
★★★★ arduino
★★★ matlab
★★★ daq
★★ arduino uno
★★ solidworks
★ rs232
★ fpga
★ serial port
★ parallel port
★ kinect
nxt
gpib
xbee
teststand
opc server
You have in mind a companion for labview and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of labview in all years. Click on graph for more.
labview
matlab
labwindows