Looking for a quick way to show your appreciation to a colleague? Try sending a thank you ecard. Thank you ecards are a clever way to show you are grateful. Choose from lots of ecards available online. Whether you are looking for humorous or heartwarming thank you ecards you are sure to find some thank you e-cards that meet your needs. The person that receives your ecard will be pleasantly surprised, especially if the ecard arrives while they are at work and wishing they weren’t!