The best replacement for ruby is python.

The best alternatives to ruby are rated as following:
★★★★★  python
★★★★  php
★★★  java
★★  perl
★★  garnet
★★  sapphire
★★  ruby on rails
★  diamond
★  javascript
★  equals
★  .net
★  c#
★  tawny port
★  vs
  emerald
  c
  sandra
  scala
  groovy
  emerald diablo 3
  node
  jruby
  mordecai's rifle
  natural ruby
  python web development
  and
  node.js
  python 2013
  tawny
  django
  crimson
  trek madone
  lisp
  kiki
  emerald pokemon
  python performance
  topaz
  smalltalk
  garnet difference
  seeker
  cerise
  rubellite
  equals operator
  tcl
  garnet stones
  php performance
  pink sapphire

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

Other search terms related to ruby and their ratings are:
★★★★★ rails
★ rvm
★ xcode
★ fuchsite
kyanite
tk
zoisite
mongodb
diamonds ring
method
diamonds earrings
You have in mind a companion for ruby and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ruby in all years. Click on graph for more.
ruby
python
php