All available post formats in WordPress are available for users to choose from and you can see the list of all and supported post formats by the Conj - eCommerce WordPress Theme which consists of:
Aside: For brief snippets of text that aren’t entirely whole blog posts, such as quick thoughts and anecdotes. Similar to a Facebook note update.
Image: A single image. The first
<img/> tag in the post content or uploaded featured image will be considered as an image post format.
Video: A single video or video playlist. The first
<video/> tag or embed in the post content will be considered as a video post format.
Quote: A quotation. The theme would add blockquote tag to the quote content automatically if the user didn't add it.
Gallery: A gallery of images. Post will likely contain a gallery shortcode and will have image attachments.
Audio: An audio file of your tunes or podcasts. The first
<audio/> tag or embed in the post content will be considered as a video post format.
Link: For those days when you just want to share a link to a fantastic article you read which creates a post that links to external resources right from the title.
Status: A quick update on what you are doing right now most likely to a Twitter status update because updates are no longer reserved for social networks.
Chat: To highlight an interesting conversation or a chat transcript you have with friends, both on and offline.