GA-970A-UD3P
M5A97 or EVO or PRO (R.2 as well)
GA-970A-UD3
970 GAMING
970A SLI Krait (USB 3.1 supported)
M5A99X EVO (R2.0 as well)
GA-990XA-UD3
990XA-GD55
Extreme6 (Termed as 990X chipset board on some sites)
Extreme9
Fatal1ty 990FX Professional
Crosshair V Formula-Z
Sabertooth 990FX R2.0
GA-99FXA-UD5
MSI GD80V2 (See NOTE1 below)
M5A99FX PRO R2.0
GA-99FXA-UD3
990FX Killer
Extreme4
Sabertooth 990fx r2.0
ANY of those boards are great for overclocking on AM3+/FX series processors. The 990fx boards are going to be a bit better and offer better features than the 970 chipset boards which are mostly budget models. Since you will mostly only find any of them used now, you can likely find 990fx boards for around the same prices anyhow.