WordPress Themes
WordPress Themes Premium
themeforest < largest collection | from $3
mysite myway < all responsive | from $35
Theme Junkie < has a good slider theme for free called Table | support starting from $39
Misty Lake < responsive and free through WordPress
MonetizeDesign < Local Business Plugin and Local Lead Booster WordPress Theme
WordPress Themes Free
WordPress Themes Free
WordPress note, you can sort by popular
Notes
Notes
Why You Should Not Use WordPress Themes from the first page of Google results