What eye liner you are using now?

MUFE Aqua XL Eyeliner on the top in Matte Black and sometimes the UD 24/7 Waterline Eye Pencil on the bottom in Walk of Shame (Nude) on the bottom
ETA - I should note that my eyes are also quite sensitive
 
I've had reactions to a few, like the stila pen one. Right now I'm using the new Too Faced sketch one (in brown) and I haven't had a reaction to it. That doesn't mean that you won't though, so it's usually best to test it out in the store.
 
I've used both Maybelline Eye Studio Gel Eyeliner (the little pot and brush) and e.l.f. eyeliner/shadow combo and haven't had any issues. My eyes are sensitive and I wear contacts as well.