stackoverflow: 213
askubuntu: 77
superuser: 64
chemistry: 49
math: 46
unix: 45
electronics: 42
english: 37
academia: 36
stats: 30
apple: 26
gaming: 25
drupal: 24
mathoverflow.net: 24
cs: 21
ell: 19
wordpress: 17
webapps: 16
physics: 16
mathematica: 15
ru.stackoverflow: 14
es.stackoverflow: 14
worldbuilding: 14
patents: 14
arduino: 13
raspberrypi: 13
travel: 13
salesforce: 13
gis: 12
scifi: 12
android: 12
diy: 12
dsp: 11
expatriates: 10
money: 10
tex: 10
rpg: 10
gamedev: 9
softwareengineering: 9