TCPShield is a free Minecraft DDoS mitigation platform used by over 2,000 Minecraft servers. TCPShield Anycasts OVH machines to offer a low latency highly protected proxy.
FluxCDN is one of the best DDoS mitigation tools on the market, in their words "Block any attack type", gives you analytics, and gives you Attack notifications. All of this starting at only $10.00/mo.
Path.net blocks dozens of attacks, they are widely known as the best on the market, they have great support, and a great API and in-depth analytics.
Cloudflare is a world leader in website DDoS mitigation. Cloudflare is so widely used that over 18% of the traffic on the internet goes through Cloudflare's network. Cloudflare provides state-of-the-art freemium (free premium level) website DDoS Protection products.