org.apache.commons.httpclient
Interfaces 
Credentials
HttpConnectionManager
HttpMethod
HttpMethodRetryHandler
MethodRetryHandler
ResponseConsumedWatcher
Classes 
AutoCloseInputStream
ChunkedInputStream
ChunkedOutputStream
ConnectMethod
ContentLengthInputStream
Cookie
DefaultHttpMethodRetryHandler
DefaultMethodRetryHandler
Header
HeaderElement
HeaderGroup
HostConfiguration
HttpClient
HttpConnection
HttpConstants
HttpMethodBase
HttpMethodDirector
HttpParser
HttpState
HttpStatus
HttpsURL
HttpURL
HttpVersion
MultiThreadedHttpConnectionManager
NameValuePair
NTCredentials
ProxyClient
ProxyClient.ConnectResponse
SimpleHttpConnectionManager
StatusLine
URI
URI.LocaleToCharsetMap
UsernamePasswordCredentials
Wire
WireLogInputStream
WireLogOutputStream
Exceptions 
ConnectionPoolTimeoutException
ConnectTimeoutException
HttpException
HttpRecoverableException
NoHttpResponseException
ProtocolException
RedirectException
URI.DefaultCharsetChanged
URIException
Errors 
HttpClientError