Hi, a GitHub user started some work on a fork of my DueTimer library: https://github.com/pklaus/DueTimer/tree/counter-implementation
I don't know if he completed it.
I'm currently working on a newer version of DueTimer, that will cal 'ArduinoTimer', and I (hope) to accomplish a Generic Timer class, that can work across multiple platforms. However, Arduino is going trough some changes on the Library patterns. I was waiting it to complete to start working on it.
The Idea is to have PWM, Counters (Virtuals and Physical), Timers and so on, all working with major Arduino Platforms.