Neville / Draco (both mpreg and non-mpreg)

Are You In Love Yet? rated PG-13
A Broom Cupboard Baby rated PG-13
The Inquisition rated NC-17
Do Not Wish rated R

Neville / other (both mpreg and non-mpreg)

Gift From Gran rated PG-13, (Neville/Harry)
If You're Breathing rated R, (Neville/Harry)
Bread and Water rated NC-17, (Neville/Snape)
The Stranger in the Tower rated PG-13, (Neville/Sirius)
Uncertain Plans rated R, (Neville/Charlie)
A Single White Rose rated NC-17, (Neville/Blaise)
Tell Tale rated PG-13, (Neville/Harry)
His Part rated PG-13, (Neville/Snape)
Better Than Handsome rated NC-17, (Neville/Remus)
Valentine's Day Bet rated PG-13, (Neville/Blaise)
Still Life rated R, (Neville/Neville)
Roommates at the Leaky Cauldron rated PG-13, (Neville/Justin)

Lupin / Harry (both mpreg and non-mpreg)

Photographs rated NC-17
Scars rated NC-17
A Matter of Choice rated NC-17
Monologue of Love rated PG-13
Found: One Marriage rated PG-13
Me Boy, You Wolf rated R
Sweet Sixteen, Again rated NC-17
Lovesick rated R
Love is a Gamble rated R
The Phases of the Moon rated NC-17
Of Wolf and Man rated NC-17
Home Comforts rated PG-13
Long Days of Summer rated NC-17

Snape / Lupin (both mpreg and non-mpreg)

Howl rated NC-17
Howdy rated PG-13
The Olive Branch rated R
Forbidden Thoughts rated NC-17
Shelter From The Storm rated PG-13
Skin Deep and sequel A Lesser Light rated NC-17
The Help rated PG-13
The Way the World Ends rated R
Domesticated Animal rated PG-13
Nice Day for a White Wedding rated NC-17
If He Tries Anything rated PG-13
Still Life rated R
The Sweetest Thing rated NC-17

MPreg (other than the pairings above)

Timing is Everything rated PG-13, (Remus/Sirius)
The Ridiculous Notion rated PG-13, (Harry/Draco)
A Marry-Me Christmas rated PG-13, (Sirius/James)
Follow Your Heart rated R, (Harry/Snape)
On My Own rated PG-13, (Remus/Sirius)
Just Tie A Knot rated R, (Harry/Bill)
Hobbes Says So rated PG-13, (Harry/Draco)
Alpha, Beta, Gamma rated PG-13, (Remus/Snape, Remus/Sirius)

OTHER (non-mpreg and not the pairings above)

A Nick In Time rated PG-13 (sequel at Inkstained Fingers), (Harry/Snape)
A Night Alone rated PG-13, (Sirius/James)
Surprised by a Kiss rated PG-13, (Sirius/James)
A Little Snow Never Hurt Anyone rated PG-13, (Sirius/James)
Tell Him rated PG, (Sirius/James)