Stand alone applications Any kind of application, such as a traditional Windows application. A sample can be List Fields , NotesBuddy or NotesPeek.
Domino Server add in tasks These application live in the server space, and obey commands like LOAD xxxx or TELL xxxx QUIT.
Notes client menu-add ins These application shows up the Notes client's Actions-menu
Import and export libraries These libraries are used during workstation import- or export.
Database hook drivers These are applications that gets called whenever a document is opened, saved or categorized.
Extension Manager hooks Extension Manager Hooks are programs containing functions to be called just prior- and/or after the real Notes functions calls. For example you may be notified just before Notes opens a new session and prepare to ask for a password. By supplying your password from your own function, you can bypass the Notes password dialog (but you can bypass Notes' need to operate in the context of a user id!)
External non-Domino database drivers External database drivers are libraries that gets called via the @DbCommand or @DbLookup @Formula calls. You can use this technique to create quick and small tools.