Four/Six:
Sky Pictures (http://idrillia-fic.livejournal.com/54497.html) by idrillia_fic - Jared is homeless & Jensen is an artist.
Five:
Life Is Like A Song (http://tabbyshhh.livejournal.com/5124.html) by tabbyshhh - Jensen is adopted by the Padalecki family after living with an abusive one. It ends up J2.
Winter Kept Us Warm (http://maddys-slash.livejournal.com/82653.html) by maddys_slash - There is a boy and he wears makeup. There is another boy who shouldn’t like the first boy, but he does. Even if he doesn’t understand why.
I would also definitely check out the abused!Jensen (http://community.livejournal.com/spnstoryfinders/tag/abused%21jensen) tag for this comm. Just browse through the comments; I'm sure something will catch your eye.
Six:
Early Mornings & Late Nights Under Overcast Skies - I cannot find the link to this!! but it's a really long J2 from Jensen's POV.
Aftermath 'Verse (http://tabaqui.livejournal.com/tag/aftermath) by tabaqui which is an AU pre-season 4. Sam gets Dean back from Hell, but has to help him deal with PTSD. eventual Wincest, told in three parts. It begins with "The Canon's Mouth"