Else 4 weights
Handsome 4 weights
Morphica 2 weights
Panoptica 7 styles; 3 weights of sans
(The last three are mine.)

BTW, the term I use for that is "uniwidth".

hhp

Mantika Sans 4 weights

Silica, by Sumner Stone:

http://stonetypefoundry.com/silicaoverview.html

Buivenga's Delicious and others: http://typophile.com/node/77895

Brandon Grotesque
http://www.hvdfonts.com/#6-Brandon%20Grotesque

Delicato

Are you sure about Anziano?

Oops! No!

This is one of the key features of the forthcoming Benedictine Pro family.
@hrant:
I took the liberty to use the term "uniwidth" in the description of the Benedictine Pro family at alterlittera.com, including a link to this post. Please let me know if you think this is not appropriate. Thanks.

Not that you need my permission or anything, but: if all the characters in all the three weights of Benedictine Pro (including kerning) take up exactly the same width, then it is indeed what I'd call uniwidth. One thing that's not clear in your text though is how the Italics play into this: I assume they're not uniwidth with the Romans, but are they uniwidth among themselves?

BTW, here's a nice new uniwidth design that really pushes the weight range envelope:
http://typographica.org/typeface-reviews/axia/

And here's an old related thread:
http://www.typophile.com/node/61252

hhp

More: http://typophile.com/node/100708

@hrant:
In order to not hijack this thread, I will be glad to answer your questions in the Benedictine Pro thread.
Thanks.

Sabon was an early famous example of a typeface where normal and italics had the same width by design, so that the typeface would be identical both on Linotype machines (where this was required for technical reasons) and on other systems of typesetting.

I’ve been meaning to develop a list of these.

QUESTION: Is there a term for typefaces that employ this “different weight, same width” technique?

Asap on Google Fonts

http://www.google.com/fonts/specimen/Asap

Chris, if you mean "different weight, same width" then that's what I use "uniwidth" for. Some people call it "duplexing" (from way back actually) but there's a confusing Two in that term, plus no reference to width.

BTW it doesn't have to be just weight: like in Sabon and Asap it could include Italics. Or even multiple styles, like in my Daam Entity from the 90s:
http://themicrofoundry.com/s_latin.html

hhp