An interesting project, so far: https://web.blogdiff.net
What is BLogDiff
BLogDiff is a tool to compare build logs in a more efficient way. The idea behind the project is simple: Sometimes it can be really hard to extract the failure cause out of a build log. It could be a minor detail as a version change of a dependency or something too big to see. BLogDiff helps to highlight the differences by loading the last successful build and comparing the current build towards it. To get an even more useful comparison, BLogDiff also removes artefacts that are not relevant (e.g. download speeds).
BLogDiff currently only supports Maven-Builds done with Travis-CI.