Yes, both Visual Studio IDE and AppVeyor offer a Free Trial.
Visual Studio IDE is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
AppVeyor is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Visual Studio IDE Starts at $45/Month whereas for AppVeyor Starts at $29.
Some top alternatives to Visual Studio IDE includes IntelliJ IDEA, Codeanywhere, Eclipse Che, CodeinCloud, CodeTogether, Microsoft Azure, ReSharper, CodeRush, Coder and CodeOnline.
Some top alternatives to AppVeyor includes Codeship, Semaphore, GitLab, CircleCI, Bamboo, Buildkite, Travis CI, Razorops and GitlabRunner.