
S3stat
Cloudlytics
Qloudstat
Google StackDriver
S3Log
Datadog
SigNoz
Mist.io
Timber
Raygun
Snare
Kafka
Sentry.io
Logentries
Fluentd
rsyslog
Cloudlytics - Analyze Your Amazon S3 & CloudFront Logs.
Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.
Qloudstat - Analytics & monitoring for access logs in Amazon S3, Amazon CloudFront, Google Cloud Storage and Rackspace CloudFiles (Akamai CDN)
Snare - Snare is well known historically as a leader in the event log space.
Google StackDriver - Stackdriver provides monitoring services for cloud-powered applications.
Kafka - Apache Kafka is publish-subscribe messaging rethought as a distributed commit log.