A lightweight simple MANUAL timer for summoner cooldowns for Windows. License can be found in the repository.
This timer is just ten "fancy" stopwatches that you need to start yourself whenever you see someone on the opposing team uses a summoner spell. It DOES NOT read values from the game and therefore DOES NOT keep track of summoner spells automatically since this is against the TOS/EULA of LoL.
Use of this application is at your own risk, however it passes the "it works on my machine test", so there's that.
If you have some constructive feedback or ideas, feel free to open an issue or PR from a fork, and I might get around to looking at it at some point ^^.