Where is the best place to store a large number of Selenium tests?
The ideal place for your selenium tests would be a source code repository, like
You don't have to host the repository yourself and can use third-party services, code hosting solutions like
And are there any tools which I can use to manage these tests, so that they run each evening?
The ideal place to run these tests would be a continuous integration (CI) server, which will aside from scheduling, solve the test result reporting problem, notifications etc. There is a number of available CI tools, like
There are also modern CI and delivery third-party services like
Travis CI or
Also look into cross-browser and cross-platform services like
Browser Stack and
Sauce Labs. They may act as a remote selenium server for your tests.