1.驗(yàn)證碼:recaptcha
gem install --source http://www.loonsoft.com/recaptcha/pkg/ recaptcha
2.搜索:acts_as_searchable是一個(gè)Rails插件，它依賴于Hyper Estraier這個(gè)獨(dú)立的搜索引擎所提供的索引和搜索服務(wù)
ferret
gem install ferret -v=0.11.5 --platform mswin32
3.pdf:
gem install pdf-writer
4.測(cè)試:
RSpec+
Mocha
5.桌面應(yīng)用
gem install anvil