If you think you get more productive with $10/month or something that most dev tools cost, why don’t you buy it on your own. After all even if it increases your salary hike by 1%, it will be worth it. I have seen designers buying Adobe tools which cost much more than dev tools, and their salary is on average lower.
I don't know where you work but in our place using tools without internal approval or certification is really frowned upon. And in the case of this particular product we were talking about, it's really an infrastructure thing. You can't implement this on your own because then your colleagues' work won't connect to yours anymore.
But also, the company should just supply the tools.
