Canon Snape may be dead (depending on how you read DH) but fanfiction is the afterlife! And as soon as Book 7 was distributed, fan writers got busy, working on ways to "fix" the canon outcome.
One of the ways that post-DH Snarry has used to resolve the problems posed by canon is portrait!Snarry. Someone (usually Snape) lives on in a portrait, which can create interesting dramatic and technical challenges. The stories below all feature Snape (and sometimes, Harry) in portrait form. We think you'll enjoy them.