Just a small sampling of what's out there that could search just as well or better:

For emacs:

  helm-ack[1]
  helm-ag[2]
  helm-git-grep[3]

For vim:

  ctrlp[4]
  unite[5]

[1] - https://github.com/syohex/emacs-helm-ack

[2] - https://github.com/syohex/emacs-helm-ag

[3] - https://github.com/yasuyk/helm-git-grep

[4] - https://github.com/kien/ctrlp.vim

[5] - https://github.com/Shougo/unite.vim