Resource post
Default Replacements:
Face Templates:
A mix of Eclipse's, Pooklet's and Katu's, including the second one.
Skintones:
Normal skintones, by Teru_k
Alien Skintone
Vampire and Zombie skintones
Pollination Techs:
Stakeit_uk's set
OR
Bondchik_nett's set
Eyes:
Resim's Retooled Eyes.
Legacy + Eye Love defaults by inkstaind_sims.
Easy/Lucky/Free on Maxis Sclera by Smjoshsims
Eyebrows:
Default eyebrows, by Rensim
Other:
NPC Default Clothes replacements (I'm using the red private school uniform).
Custom Content:
Hair
Rose
Peggysims2
Raonjena
Garden of Shadows
XMSims
Louis
SAU
Digital Perversion
Problematique
Clothes
Artemistha
Peggysims2
Sims 2 Heaven
Lianasims2
Club Crimsyn
A+S=Error Sims (Great male clothes)
SiXSiXSiMS (Awesome teen clothes this way!)
Useless Trend
Imaginary
All About Style
Vanilla Femme
Modish Kitten
Bexy's Boutique
Furniture
11dots
4eversimfantasy
Reflexsims
Simcredible
XMSims
Sims in Paris
Murano Mobilia
Mango
Pixel Sims (Mostly windows in this website)
Simgedöhns
Sirona Sims
Stylist Sims
Sims2Studio
Makeup:
Helaene
Rensim
Simcribbling
Sims 2 Heaven
Accessories:
Louis
Rose
Dedital Sheep Bower
Houses:
Parsimonious
Simgedöhns
MTS2 Creators:
Chakaru
HystericalParoxysm
Nimoemo
Amandaskeefer
Bruno
Macarossi
Margierytka
Grito
Blake_boy
Dezeedoesdance
Lunar_Eclipse
Jgwhiteus
Moon_Ez
Pickpock
Simfantastic2
Reisuru
Somethingorother
q3tbo
Sizz
Twinkleta
Simgirl24
Boblishman
LJ Comms:
wella_creations
Posing hacks:
List from Sims2Wiki. You can find practically anything in there :P
Camera:
Gunmod's Camera Mod. Fabulous camera controls, though beware of lag. The version that I'm using is GCM-31-A.
Other Hacks/Mods:
Modified NPC and Townie names
ACR
The InSIMenator
The InTeenimater
More than 8 sims per lot
Triplets and Quadruplets hack
Same Sex Pregnancy (Note: Don't use this if you have InTeen installed!)
College Adjuster (A godsend if you get bored with college, like me).
[EDIT]: My list is outdated as hell, and half the links aren't working. However, several of the hacks mentioned here can be found in this forum, so go look through it if you're feeling adventurous!
And don't forget:
MATY
The booty*
Because they make the world a better place :D
*If you find yourself coming across a pay-only object, you can probably find it for free in here. Example: Peggy hairs, Rose hairs, etc.