In the Survey Manager -> Survey Editor section,
you usually adding Items of sorts.

Questions, Display, Report & Action Items.

Is it possible for us to develop and embed/deploy our own Items?

Possible Uses:

-> Creating a "Open Ended Single-Line Text" item to encapsulate "Masks" from 3rd party control vendors etc..
-> Extended Action Items for Logging and Tracking purposes (writing info to a database, etc..)