Diadema is a free WordPress theme with options page. Supports the post thumbnails. Suitable for any niche.

Features:

• WordPress 3.0 Ready ( Custom Menus & Custom Background)
• Options Page
• Post Thumbnails
• Featured Content
• 125×125 banners ready (easy editable from admin options)
• Two columns
• Gravatar on Comments
• Compatible with latest WordPress versions
• Widgets Ready
• SEO Optimized
• Fixed width
• Logo .PSD file included in theme folder.
• Tested and compatible with all major browsers: IE, FF, Safari