The AD8542 are single rail dual op-amps with very low current and bandwidth of 1MHz from Analog devices. They can operate from a single supply ranging starting from 2.7V.
The OPA2134 Op-Amp is a low-cost, high-Performance Audio Operational Amplifier. The OPA2134 series is ultra-low distortion, low-noise operational amplifiers fully specified for audio applications.
The LM2904 IC consists of two independent, high gain, internally frequency compensated operational amplifiers. LM2904 IC is specifically designed to operate from a single power supply over a wide range of voltages.
The LM1558 are general purpose dual operational amplifiers. The two amplifiers inside this single IC share a common bias network, and power supply leads. Otherwise, their operation is completely independent.