A C++ diagnostic logging API that is simple to use, 100% type-safe, generic, infinitely-extensible, atomic, platform-independent, and extremely efficient. And, best of all, it upholds the spirit of C: you only pay for what you use. Pantheios is readily extended to use the existing transport mechanisms of feature-rich diagnostic logging libraries such as ACE, log4cpp, log4cplus, log4cxx. 

Pantheios - The C/C++ Logging Sweetspot

Sends your logs to files, sockets, inboxes, databases and various web services from PHP. It can log to files and syslogs, Send alerts and emails,  Log specific servers and networked logging, Log to databases and lot more.

Monolog - Logging for PHP

Flume is a distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log data. It has a simple and flexible architecture based on streaming data flows. It is robust and fault tolerant with tunable reliability mechanisms and many failover and recovery mechanisms. It uses a simple extensible data model that allows for online analytic application.

Flume - Log management using HDFS

LogTrail is a plugin for Kibana to view, analyze, search and tail log events from multiple hosts in realtime with devops friendly interface inspired by Papertrail.
 
<ul>
<li>View, analyze and search log events from a centralized interface</li>
<li>Clean &amp; simple devops friendly interface</li>
<li>Live tail</li>
<li>Filter aggregated logs by hosts and program</li>
<li>Quickly seek to logs based on time</li>
<li>Supports highlighting of search matches</li>
<li>Supports multiple Elasticsearch index patterns each with different schemas</li>
<li>Can be extended by adding additional fields to log event</li>
<li>Color coding of messages based on field values</li>
</ul>

LogTrail is a plugin for Kibana to view, analyze, search and tail log events from multiple hosts in realtime with devops friendly interface inspired by Papertrail.

LogTrail - Log Viewer plugin for Kibana


Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Fluentd helps you unify your logging infrastructure. Fluentd can be used to tail access/error logs and transport them reliably to remote systems. It can "grep" for events and send out alerts. It can function as middleware to enable asynchronous, scalable logging for user action events.
 
Fluentd tries to structure data as JSON as much as possible: this allows Fluentd to unify all facets of processing log data: collecting, filtering, buffering, and outputting logs across multiple sources and destinations (Unified Logging Layer). The downstream data processing is much easier with JSON, since it has enough structure to be accessible while retaining flexible schemas.

Fluentd collects events from various data sources and writes them to files, RDBMS, NoSQL, IaaS, SaaS, Hadoop and so on. Fluentd helps you unify your logging infrastructure. Fluentd can be used to tail access/error logs and transport them reliably to remote systems. It can "grep" for events and send out alerts. It can function as middleware to enable asynchronous, scalable logging for user action events.

Fluentd - Unified Logging Layer

nxlog is a modular, multi-threaded, high-performance log management solution with multi-platform support. In concept it is similar to syslog-ng or rsyslog but is not limited to unix/syslog only. It can collect logs from files in various formats, receive logs from the network remotely over UDP, TCP or TLS/SSL . It supports platform specific sources such as the Windows Eventlog, Linux kernel logs, Android logs, local syslog etc. 
 Writing and reading logs to/from databases is also supported. The collected logs can be stored into files, databases or forwarded to a remote log server using various protocols. The old BSD Syslog and the newer IETF syslog standard is fully supported by nxlog in addition to other custom formats. A key concept in nxlog is to be able to handle and preserve structured logs so there is no need to convert everything to syslog and then parse these logs again at the other side. It has powerful message filtering, log rewrite and conversion capabilities.

nxlog is a modular, multi-threaded, high-performance log management solution with multi-platform support. In concept it is similar to syslog-ng or rsyslog but is not limited to unix/syslog only. It can collect logs from files in various formats, receive logs from the network remotely over UDP, TCP or TLS/SSL . It supports platform specific sources such as the Windows Eventlog, Linux kernel logs, Android logs, local syslog etc.

nxlog - Multi platform Log management

Graylog2 is an open source log management solution that stores your logs in ElasticSearch. It consists of a server written in Java that accepts your syslog messages via TCP, UDP or AMQP and stores it in the database. The second part is a web interface that allows you to manage the log messages from your web browser. Take a look at the screenshots or the latest release info page to get a feeling of what you can do with Graylog2. 

Graylog2 - Open Source Log Management

Meniscus is a Python based system for event collection, transit and processing in the large. It's primary use case is for large-scale Cloud logging, but can be used in many other scenarios including usage reporting and API tracing. Its components include Collection, Transport, Storage, Event Processing & Enhancement, Complex Event Processing, Analytics.


Meniscus - The Python Event Logging Service

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