diff --git a/functions/brew/_brew b/functions/brew/_brew
new file mode 100644
index 00000000..4e590ac6
--- /dev/null
+++ b/functions/brew/_brew
@@ -0,0 +1,69 @@
+#compdef brew
+#autoload
+
+# imported from the latest homebrew contributions
+
+_brew_all_formulae() {
+  formulae=(`brew search`)
+}
+
+_brew_installed_formulae() {
+  installed_formulae=(`brew list`)
+}
+
+local -a _1st_arguments
+_1st_arguments=(
+  'cat:display formula file for a formula'
+  'cleanup:uninstall unused and old versions of packages'
+  'create:create a new formula'
+  'deps:list dependencies and dependants of a formula'
+  'doctor:audits your installation for common issues'
+  'edit:edit a formula'
+  'home:visit the homepage of a formula or the brew project'
+  'info:information about a formula'
+  'install:install a formula'
+  'link:link a formula'
+  'list:list files in a formula or not-installed formulae'
+  'log:git commit log for a formula'
+  'outdated:list formulas for which a newer version is available'
+  'prune:remove dead links'
+  'remove:remove a formula'
+  'search:search for a formula (/regex/ or string)'
+  'unlink:unlink a formula'
+  'update:freshen up links'
+  'uses:show formulas which depend on a formula'
+)
+
+local expl
+local -a formula installed_formulae
+
+_arguments \
+  '(-v --verbose)'{-v,--verbose}'[verbose]' \
+  '(--version)--version[version information]' \
+  '(--prefix)--prefix[where brew lives on this system]' \
+  '(--cache)--cache[brew cache]' \
+  '*:: :->subcmds' && return 0
+
+if (( CURRENT == 1 )); then
+  _describe -t commands "brew subcommand" _1st_arguments
+  return
+fi
+
+case "$words[1]" in
+  list)
+    _arguments \
+      '(--unbrewed)--unbrewed[files in brew --prefix not controlled by brew]' \
+      '1: :->forms' &&  return 0
+
+      if [[ "$state" == forms ]]; then
+        _brew_installed_formulae
+        _requested installed_formulae expl 'installed formulae' compadd -a installed_formulae
+      fi ;;
+  install|home|log|info|uses|cat|deps)
+    _brew_all_formulae
+    _wanted formulae expl 'all formulae' compadd -a formulae ;;
+  remove|edit|xo)
+    _brew_installed_formulae
+    _wanted installed_formulae expl 'installed formulae' compadd -a installed_formulae ;;
+esac
+
diff --git a/functions/gem/_gem b/functions/gem/_gem
new file mode 100644
index 00000000..83cba40d
--- /dev/null
+++ b/functions/gem/_gem
@@ -0,0 +1,64 @@
+#compdef gem
+#autoload
+
+# gem zsh completion, based on homebrew completion
+
+_gem_installed() {
+  installed_gems=(`gem list --local --no-versions`)
+}
+
+local -a _1st_arguments
+_1st_arguments=(
+  'cert:Manage RubyGems certificates and signing settings'
+  'check:Check installed gems'
+  'cleanup:Clean up old versions of installed gems in the local repository'
+  'contents:Display the contents of the installed gems'
+  'dependency:Show the dependencies of an installed gem'
+  'environment:Display information about the RubyGems environment'
+  'fetch:Download a gem and place it in the current directory'
+  'generate_index:Generates the index files for a gem server directory'
+  'help:Provide help on the `gem` command'
+  'install:Install a gem into the local repository'
+  'list:Display gems whose name starts with STRING'
+  'lock:Generate a lockdown list of gems'
+  'mirror:Mirror a gem repository'
+  'outdated:Display all gems that need updates'
+  'owner:Manage gem owners on RubyGems.org.'
+  'pristine:Restores installed gems to pristine condition from files located in the gem cache'
+  'push:Push a gem up to RubyGems.org'
+  'query:Query gem information in local or remote repositories'
+  'rdoc:Generates RDoc for pre-installed gems'
+  'search:Display all gems whose name contains STRING'
+  'server:Documentation and gem repository HTTP server'
+  'sources:Manage the sources and cache file RubyGems uses to search for gems'
+  'specification:Display gem specification (in yaml)'
+  'stale:List gems along with access times'
+  'uninstall:Uninstall gems from the local repository'
+  'unpack:Unpack an installed gem to the current directory'
+  'update:Update the named gems (or all installed gems) in the local repository'
+  'which:Find the location of a library file you can require'
+)
+
+local expl
+local -a gems installed_gems
+
+_arguments \
+  '(-v --version)'{-v,--version}'[show version]' \
+  '(-h --help)'{-h,--help}'[show help]' \
+  '*:: :->subcmds' && return 0
+
+if (( CURRENT == 1 )); then
+  _describe -t commands "gem subcommand" _1st_arguments
+  return
+fi
+
+case "$words[1]" in
+  list)
+      if [[ "$state" == forms ]]; then
+        _gem_installed
+        _requested installed_gems expl 'installed gems' compadd -a installed_gems
+      fi ;;
+  uninstall|update)
+    _gem_installed
+    _wanted installed_gems expl 'installed gems' compadd -a installed_gems ;;
+esac
diff --git a/plugins/brew.plugin.zsh b/plugins/brew.plugin.zsh
index 162eb644..a3054096 100644
--- a/plugins/brew.plugin.zsh
+++ b/plugins/brew.plugin.zsh
@@ -1,67 +1,4 @@
-#compdef brew
-
-# imported from the latest homebrew contributions
-
-_brew_all_formulae() {
-  formulae=(`brew search`)
-}
-
-_brew_installed_formulae() {
-  installed_formulae=(`brew list`)
-}
-
-local -a _1st_arguments
-_1st_arguments=(
-  'cat:display formula file for a formula'
-  'cleanup:uninstall unused and old versions of packages'
-  'create:create a new formula'
-  'deps:list dependencies and dependants of a formula'
-  'doctor:audits your installation for common issues'
-  'edit:edit a formula'
-  'home:visit the homepage of a formula or the brew project'
-  'info:information about a formula'
-  'install:install a formula'
-  'link:link a formula'
-  'list:list files in a formula or not-installed formulae'
-  'log:git commit log for a formula'
-  'outdated:list formulas for which a newer version is available'
-  'prune:remove dead links'
-  'remove:remove a formula'
-  'search:search for a formula (/regex/ or string)'
-  'unlink:unlink a formula'
-  'update:freshen up links'
-  'uses:show formulas which depend on a formula'
-)
-
-local expl
-local -a formula installed_formulae
-
-_arguments \
-  '(-v --verbose)'{-v,--verbose}'[verbose]' \
-  '(--version)--version[version information]' \
-  '(--prefix)--prefix[where brew lives on this system]' \
-  '(--cache)--cache[brew cache]' \
-  '*:: :->subcmds' && return 0
-
-if (( CURRENT == 1 )); then
-  _describe -t commands "brew subcommand" _1st_arguments
-  return
-fi
-
-case "$words[1]" in
-  list)
-    _arguments \
-      '(--unbrewed)--unbrewed[files in brew --prefix not controlled by brew]' \
-      '1: :->forms' &&  return 0
-
-      if [[ "$state" == forms ]]; then
-        _brew_installed_formulae
-        _requested installed_formulae expl 'installed formulae' compadd -a installed_formulae
-      fi ;;
-  install|home|log|info|uses|cat|deps)
-    _brew_all_formulae
-    _wanted formulae expl 'all formulae' compadd -a formulae ;;
-  remove|edit|xo)
-    _brew_installed_formulae
-    _wanted installed_formulae expl 'installed formulae' compadd -a installed_formulae ;;
-esac
+# add brew completion function to path
+fpath=($ZSH/functions/brew $fpath)
+autoload -U compinit
+compinit -i
diff --git a/plugins/gem.plugin.zsh b/plugins/gem.plugin.zsh
new file mode 100644
index 00000000..0b6ef3c8
--- /dev/null
+++ b/plugins/gem.plugin.zsh
@@ -0,0 +1,4 @@
+# add brew completion function to path
+fpath=($ZSH/functions/gem $fpath)
+autoload -U compinit
+compinit -i