I’ve read a lot of fanfictions in the three years since I’ve first discovered them and these are just a few of them, the ones I’ve read most recently. Most of them, if not all, are rated M with some T rating in some cases. I encourage you NOT to read them if you are underage as they contain adult themes, coarse language and/or sexual situations.
The list will be expanding as I continue to read and enjoy fanfiction works from the Harry Potter universe.

Without further ado here are my Non Harry Potter favourites grouped by paring:

Harry Potter/Draco Malfoy (soon)
Harry Potter/Severus Snape (soon)
Hermione Granger/Draco Malfoy (soon)
Hermione Granger/Harry Potter (soon)
Hermione Granger/Lucius Malfoy (available now)
Hermione Granger/Remus Lupin (soon)
Hermione Granger/Severus Snape (available now)
Hermione Granger/Sirius Black (soon)