I've been using Gameplay Time Tracker alongside Raptr for around 2 months and am very pleased with, it's stable and flexible (allows you add manually add hours if needed).
The software can be found by googling 'Gameplay time tracker'. I wont post a direct link as then this post will require admin approval (not sure if there are still any admins around :( ) .
I've written with the author, who is working on adding support for importing Raptr hours. I've seen him my Raptr JSON test. He mentioned that others are welcome to send their Raptr JSON file if they wish to have their data imported into Gameplay time tracker. His email email@example.com The more data he can get the better his parsing of data will be.