Full featured portfolio design
Price: $50
Have great photos or illustrations to share?  Or have a portfolio of websites to showcase to your potential clients?  Agency puts those images up front and center.  This custom portfolio theme includes an easy way to manage team members (add and manage links to their social profiles), add and attach testimonials easily, built-in contact form, a custom homepage template, includes Nivo Slider, customizable color scheme, custom logo & background, and more.
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More portfolio themes: Responsive Portfolio WordPress Theme

Theme designed for freelancers or small businesses who want a portfolio
Price: $29 (access to all ThemesKingdom themes)
Invo is a WordPress theme that includes many custom features desired in a freelance business, consisting of: a client contact form for requesting quotes, a convenient client login form so special clients can access a dashboard in the back-end, custom client invoicing, 2-inbuilt payment gateways, and most importantly a portfolio template to showcase your work.
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More portfolio themes: Portfolio WordPress Themes

Responsive theme that is BuddyPress compatible
Price: $49
Lush is a premium theme that comes with a responsive design, full width slider, background and color options, event management post type and it is BuddyPress compatible.
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More portfolio themes: Business Premium WordPress Themes

An innovative but minimalistic premium theme
Price: $35
Innovative is a premium responsive theme that comes with 7 color styles, multiple backgrounds to choose, 4 custom widgets, a 3 column sortable portfolio, gallery, add your testimonials in style, flexible columns, incredible pricing tables, touch-swipe enabled featured slider with video support, 5 built-in custom page templates, a custom contact form, sitemap template, easy theme options, and much more.
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See some more great themes: Responsive Portfolio WordPress Themes

A responsive portfolio theme with a modern and clean design
Price: $35
Theme features: 8 templates, slider with 5 options, simple theme options setting, 3 custom portfolio types, 3 custom post types, filterable portfolio, and more.
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See some more great themes: Responsive Portfolio WordPress Themes