Wow there are so many...
Ok I'll try to tell you only about non-hillclimb tracks!
How about Blackwood? There are two versions of it though, and not everybody like the Reloaded version apparently (I love it personnally).
Blackwood v1.02 =>
http://www.racedepartment.com/downloads/blackwood.2639/
Blackwood Reloaded v0.8 =>
http://www.racedepartment.com/downloads/blackwood-reloaded-uhd-version.5804/
Autodrom Grobnik v2.71 is really great too =>
http://www.racedepartment.com/downloads/automotodrom-grobnik.4835/
Mills Metro Park v1.1 =>
http://www.racedepartment.com/downloads/mills-metropark.7222/
Montreal v0.37 =>
http://www.racedepartment.com/downloads/circuit-gilles-villeneuve-montréal-québec-canada.4439/
Bathurst v1.01 =>
http://www.racedepartment.com/downloads/bathurst.8677/
Also, even if they don't look as great as Kunos tracks, I think you should check EVERY track made by "Rainmaker".
Avoid the ones on RD as they're outdated though.
If you have an account on NoGripRacing, you have access to many of them there =>
http://www.nogripracing.com/files.php?subcat=140
etc. There are countless tracks for you!
P.S: "ACU" tracks are illegal conversions (right?) but unfortunately they're also the best looking ever. Look up Estoril, it looks incredible.