HA will still work if its been configured vcenter is not required for HA to function, only required to configue HA.
DRS requires vmotion which is a vcenter function so it will stop functioning.
FT im not 100% but i belive its the same as HA once configured through vcenter it will still function if vcenter was to go down. The primary and secondary vm exchange heartbeats to make sure both are available and if not then it fails over without the need of vcenter. but if vcenter is unavailable and and FT has failed to the secondary i believe you will need vcenter up and available to set it back up.
*Edit a.p beat me to it
1.VM's will Work,
2. vMotion Will not work
3. DRS will not work
4.FT will continue to work for the configured VMs. However in case of a failover, no new Secondary will be created
5.You will not be able to Deploy vm from templates
6. You cannot clone the VM
7. You can take a snapshot of VM by connecting to the Host using vSphere Client
8. HA will continue to work, you will not be able to change the configuration
9. dvSwith Continues to work ,you will not be able to change the configuration
10. vSwitch continuous to work, You can even make changes to vSwitch