“To Allaah belong the Most Perfect and Beautiful Names, so worship Him in accordance with them and call on Him by them, and abandon those who deviate with regard to His Names.” [Al-A’raaf (7:180)]

Aboo Hurairah (radiallaahu ‘anhu) reported that Allaah’s Messenger (sallallaahu ‘alaihi wassallam) said:
“Allaah has ninety-nine Names, one-hundred except for one. Whoever correctly preserves them and acts in accordance with them will enter Paradise.” [Reported by al-Bukhaaree and Muslim]

Link which mentions 99 Names of Allaah:
http://www.salafipublications.com/sps/downloads/pdf/AQD030013.pdf