Is there a DNS lookup, traceroute, ping and HTTP GET as a service?

Hi, I'm evaluating different datacenters and vendors accross the globe and it isn't worthy to perform tests like DNS, traceroute, ping and HTTP GET from my office. I need to be able to perform this tests remotely, from multiple endpoints. The only company I know allow such thing is ThousandEyes, but it is brutally and inexplicably expensive and doesn't fit perfectly to what I'm looking for. It has a paradigm I'm willing to monitor 24x7 specific targets from multiple points of view. I need to make tests on demand, on different targets and URLs. Does anyone know such service, DNS lookup, traceroute, ping and HTTP GET as a service from multiple nodes geographically spread? Thanks in advance, Kurt Kraut