helper

noun5

1. •
   One who helps; an aide; assistant; auxiliary.
2. •
   That which helps; anything serving to assist.

   • While Adobe's Acrobat Reader, Macromedia's Flash player, and other common plug-ins suggest themselves the moment you encounter a site that requires them, other browser helpers are harder to find. — 2005
3. •
   (Philippines, Singapore) A person who does cleaning and cooking in a family home, or in a market; domestic employee.
4. •
   (US) A locomotive that assists a train, usually on steep gradients.
5. •
   (slang) A stimulating pill, especially amphetamine.

   • And I routinely took more “helpers” when I woke up in order to maintain the fast pace and, more importantly, to study for my final exams. — 1985