DialectX

However, for a lot of people a linguistic assimilation is the key to professional success. This simple application was designed specifically for that: improve foreign accents and minor speech imperfections.
Be able to hear yourself as you speak is the key for any voice correction.

You know how the native speakers sounds and you should be able improve yourself accordingly. Use DialectX software. Try to find comfortable Voiceback delay. You will be pleasantly surprised on the efficiency of this simple app. Microphone and headphones are required.