Weblogs, forum or wordpress

Interactive website inside your website or separate. A corporate blog, this is how modern companies communicate with their customers and stockholders. A public web site where users post informal journals of their thoughts, comments, and philosophies, updated frequently and normally reflecting the views of the blog's creator. 

Be aware that if you want a "blog", you will have to manage it.

Gallery

The gallery can be private, accessible to registered users only, and/or open to all visitors to your site. Users, if permitted, can upload pictures with their web browser (thumbnail and intermediate sized images are created on the fly), rate pictures, add comments and even send e-cards. The site administrator determines which of the features listed above are accessible and can also manage the galleries.

The gallery could be framed as a web page in your web site: View a sample Gallery
The gallery can be accessed independently

Note:The gallery needs to be managed too by you.