aws-sign2(latest: 0.7.0) AWS signing. Originally pulled from LearnBoost/knox, maintained as vendor in request, now a standalone module.
tunnel-agent(latest: 0.6.0) HTTP proxy tunneling agent. Formerly part of mikeal/request, now a standalone module.
forever-agent(latest: 0.6.1) HTTP Agent that keeps socket connections alive between keep-alive requests. Formerly part of mikeal/request, now a standalone module.
oauth-sign(latest: 0.9.0) OAuth 1 signing. Formerly a vendor lib in mikeal/request, now a standalone module.
caseless(latest: 0.12.0) Caseless object set/get/has, very useful when working with HTTP headers.
form-data(latest: 4.0.0) A library to create readable "multipart/form-data" streams. Can be used to submit forms and file uploads to other web applications.