The qcircuit latex package uses the xy-matrix package to create quantum circuits including all types of gates (simple, multi, controlled), a lot of measurement personalization, etc...
This is a representation of Grover's Algorithm with a circuit created in latex with qcircuit.
There is a reference PDF created by Bryan Eastin, Steve T Flammia and Travis L Scholten. Despite its excellent quality, I think it would be a good idea to create a qcircuit quickref (Like the MathJax quickref on meta math exchange). It would help new people to learn about this latex package to help in documents they create. It also would make people able to share knowledge, tips and tricks about the package that is not necessarily shown in the pdf.