What open source program is the best example of Ruby programming to study to learn the language better?

Looking for a good open source program to study in order to pick up on the idioms of Ruby programming that make Ruby programs uniquely succinct, elegant, powerful, profound, and readable. I am looking for a program that when I study thee source code for it, it will show me the strengths of the language.

Sort of like design patterns but code patterns. You know, good idioms of the language that are in popular use.

I Don't Have A PlugIns Menu In My WordPress Blog?

Every support doc. i’ve read, automatically assumes i have a Plugins menu in my WordPress blog after ‘Appearance’ and Before ‘Users’, which i can use to execute various code.

However i’ve been through my entire blog menu and i can’t seen to find the ‘Plugins’ menu.

I’m using a theme ‘cutline’ and am on a free account.

Also, i’ve tried to find out how to install plug-ins and couldn’t understand a word.

Does anyone have a step by step approach which starts from ‘Boot Into Windows’.
I’m on the WordPress.com account. Not WordPress.org.

What i’m trying to do is add ‘Google Analytics’ to my Blog. Does anyone know how to do that?