With ever increasing usage of mobile devices, Mobile ad-hoc Network (MANET) will eventually become almost indispensable part of wireless communication field. Due to this advancement, there are potential opportunities for using MANET in real time and multimedia applications and Quality of Service (QoS) is vital for implementing such applications. Since MANET is infrastructure less with the nodes moving dynamically, ensuring of QoS parameters like bandwidth, delay, throughput etc are challenging. Designing of optimum Routing protocols with QoS constraints is one of the active research areas in MANET. This paper provides a survey of some of the existing MANET protocols with QoS support.