September 11 is a day of remembrance and commemoration – and for some Instagrammers, a promotional opportunity.

Instagrammers are posting images in New York and using 9/11-related captions to promote their own their own brands and products through hashtags and in-photo tagging.

Fashion influencers including Whitney Rife Becker, Ally Noriega, Katy Harrell and Lays Brenha, promoted themselves by tagging the startup LiketoKnow.It, an app that lets influencers and fashion bloggers promote their style.

Style influencer Katy Harrell tagged LiketoKnow.It in her tribute.

Foto: Style influencer Katy Harrell tagged LiketoKnow.It in her tribute.sourceInstagram/mumuandmacaroons

Influencer Lays Brenha shared a tribute post that tagged several brands.

Foto: Influencer Lays Brenha shared a tribute post that tagged several brands.sourceInstagram/Lays Brenha

Jessica Teague shared a tribute post.

Foto: Jessica Teague shared a tribute post.sourceInstagram/jessicalteague

Influencer Ally Noriega shared a tribute post

Foto: Influencer Ally Noriega shared a tribute post.sourceInstagram/Ally Noriega

Instagrammer Makenna Willhite shared a tribute post.

Foto: Instagrammer Makenna Willhite shared a tribute post.sourceInstagram/Makenna Willhite

Instagrammer Sarah Bliss shared a tribute post.

Foto: Instagrammer Sarah Bliss shared a tribute post.sourceInstagram/Sarah Bliss

Whitney Rife Becker shared a tribute post

Foto: Whitney Rife Becker shared a tribute post.sourceInstagram/Whitney Rife Becker

Instagrammer alwaysmeliss shared a photo of herself New York while tagging several brands.

Foto: Instagrammer alwaysmeliss shared a photo of herself New York while tagging several brands.sourceInstagram/alwaysmeliss

Brands, too, are being pulled into promotions.

People have hashtagged LuLaRoe, and local tanning salons, jewelry companies, and an installation parts supply all promoted their brands while commemorating 9/11, a day where nearly 3,000 people died in terror attacks in 2001.

Installation Parts Supply promoting its store in a 9/11 Instagram post.

Foto: Installation Parts Supply promoting its store in a 9/11 Instagram post.sourceInstagram/Installation Parts Supply

Spray tan company Bahama Mamas' tribute.

Foto: Spray tan company Bahama Mamas' tribute.sourceInstagram/bahama__mamas

Instagrammer terasabianca tagged a hotel in her tribute post.

Foto: Instagrammer terasabianca tagged a hotel in her tribute post.sourceInstagram/terasabianca

SoCal Threads Boutique paid tribute to 9/11 with a star-patterned sweater.

Foto: SoCal Threads Boutique paid tribute to 9/11 with a star-patterned sweater.sourceInstagram/SoCal Threads Boutique

One woman tagged yoga-related brands.

Foto: One woman tagged yoga-related brands.sourceInstagram/mckenzie.payne

A bikini company hashtagged its brandname in this 9/11 tribute.

Foto: A bikini company hashtagged its brand name in this 9/11 tribute.sourceInstagram/Bikinislayer

Instagrammer keep.key.with.jackie promotes bracelets in a 9/11 tribute post.

Foto: Instagrammer keep.key.with.jackie promotes bracelets in a 9/11 tribute post.sourcekeep.key.with.jackie/Insider.com

An Alex and Ani store in Scottsdale commemorated the day by showcasing its jewelry.

Alex and Ani Scottsdale posted about 9/11 on its Instagram.

Foto: Alex and Ani Scottsdale posted about 9/11 on its Instagram.sourceInstagram/Alex and Ani Scottsdale

Alongsige hashtags like #911memorial, #neverforget, and #worldtradecenter, Instagrammers have included travel hashtags, captions about yoga, and more.

Instagrammer Livefreewarrior promoting brands and hotels in a 9/11 tribute post

Foto: Instagrammer Livefreewarrior promoting brands and hotels in a 9/11 tribute postsourceInstagram/Livefreewarrior

Sara Quiriconi, a health and travel Instagrammer with 34,000 followers told Insider that she saw today as an opportunity to show camaraderie and respect.

In her photo, she tagged several travel blogs, a hotel, and a yoga company.

Read more: 7 ways that 9/11 created a dystopian security landscape that Americans are still living in

Quiriconi said via email: "When tragedy strikes, it's an opportunity, I believe, for those in travel and hospitality. Cities, islands, communities that are largely visited by tourists worldwide, holding respect for the resilience of that city or destination and inspiration that communities coming together to rise again is the same camaraderie and inner warrior spirit that a frequent traveler has. Travel unites us, tragedy unites us, joyous celebration unites all...it's all the same. I took the opportunity to share my first photos of seeing ground zero and the memorial for my first time while visiting New York City on a business trip, inspiring and tying together the feeling of TRIUMPH to overcome, just like my cancer diagnosis (and being a 16 year survivor)."

Reality star Kristin Cavallari was criticized after a photo was posted to her Instagram with the caption "NYC for 24hrs. And what a time to be here..always remember." The caption was quickly changed, and the employee who posted the caption was fired, according to Fox News.

http://instagr.am/p/B2Rbgu4H4W-

Insider has contacted Alex and Ani, LulaRoe, and LiketoKnow.It as well as several influencers for comment.