cfis : Resurrecting libxml-ruby
ruby's libxml bindings get a breath of fresh air
Riding Rails: Gem Packaging: Best Practices
How to Name Gems
Here is my STRONG recommendation on how to name gems:
weppos/publicsuffix-ruby: Domain name parser for Ruby based on the Public Suffix List.
solisoft/paypal_nvp: Paypal NVP API Class
a lightweight client for the paypal NVP API
mdub/clamp: a Ruby command-line application framework
Mike Williams gem for creating quick CLI apps