Framework:

Global
Application
Request
Response
Session
HopObject
Path
Root
User
File
FtpClient
Image
Mail
Remote
Xml
DatabaseObject
DatabaseObject.Rowset
MimePart
Skin

Modules:

core Array
core Date
core Number
core Object
core String

helma.Aspects
helma.Chart
helma.Color
helma.Database
helma.File
helma.Ftp
helma.Html
helma.Http
helma.Mail
helma.Search
helma.Skin
helma.Ssh
helma.Url
helma.Zip