The best replacement for nvidia is ati.

The best alternatives to nvidia are rated as following:
★★★★★  ati
★★★★★  radeon
★★★  amd
★★★  intel
★★  ati radeon
★  amd gpu
★  evga
★  geforce
★  intel graphics
★  ati graphics card
★  ati for gaming
★  ati video card
★  ati linux
  ati benchmarks
  amd linux
  amd radeon
  amd graphics
  ati graphics
  intel chipset
  via
  intel hd graphics
  radeon video cards
  amd mining
  ati gaming
  radeon video card
  ati video cards
  qualcomm
  ati graphics cards
  amd graphics cards
  nvidia
  nouveau
  ati which is better
  mantle
  ati with amd
  radeon 2013
  radeon graphics card
  ati chipset
  pny
  ati drivers
  omega drivers
  ati comparison
  500mhz ati
  amd video cards

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

Other search terms related to nvidia and their ratings are:
★★★★★ cuda
★★★★ amd
★★ amd cpu
★★ intel
★★ hdmi output
★★ amd processor
★★ cgminer
★ mantle
★ 3 monitors
★ tv out
★ ati
hdmi audio
3d tv
physx
mac pro
You have in mind a companion for nvidia and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of nvidia in all years. Click on graph for more.
nvidia
ati
radeon