Doa untuk berbuka puasa

ذَهَـبَ الظَّمَـأُ، وَابْتَلَّـتِ العُـروق، وَثَبَـتَ الأجْـرُ إِنْ شـاءَ الله
Thahabadh-dhama'u wabtallatil-'urooqu, wa thabatal-'ajru 'inshaa'Allaah

The thirst is gone, the veins are moistened and the reward is confirmed, if Allah wills
(Abu Dawud 2/306 and others)