GRIDGAIN- An Open Source In-memory Computing Tool

GridGain’s open source software provides immediate, unhindered freedom to develop with the most mature, complete and tested in-memory computing platform on the market, enabling computation and transactions orders of magnitude faster than traditional technologies allow. From high performance computing, streaming and data grid to an industry first in-memory Hadoop accelerator, GridGain provides a complete end-to-end stack for low-latency, high performance computing for each and every category of payload and data processing requirements.

Hazelcast– An Open Source In-memory Computing Tool

Hazelcast, an open source clustering and highly scalable data distribution platform written in Java, focuses on latency and makes it easier to cache/share/operate TB's of data in-memory. Storing terabytes of data in-memory is not a problem but avoiding GC to achieve predictable, low latency and being resilient to crashes are big challenges. By default, Hazelcast stores your distributed data (map entries, queue items) into Java heap which is subject to garbage collection. As your heap gets bigger, garbage collection might cause your application to pause tens of seconds, badly affecting your application performance and response times. Elastic Memory is Hazelcast with off-heap memory storage to avoid GC pauses. Even if you have terabytes of cache in-memory with lots of updates, GC will have almost no effect; resulting in more predictable latency and throughput. 

NMemory– An Open Source In-memory Computing Tool

NMemory is an open source In-Memory computing database. It can be hosted by .NET applications and supports traditional database features like indexes, foreign key relations, transaction handling and isolation, stored procedures, query optimization, field constraints.

Currently it just serves as the core component of the Effort library. However, developer interest and contribution could make it a more robust engine that might serve well in a wide range of scenarios.

Bugzilla - Open Source Bug Tracking

Bugzilla is a "Defect Tracking System" or "Bug-Tracking System". Defect Tracking Systems allow individual or groups of developers to keep track of outstanding bugs in their product effectively. Bugzilla can help you get a handle on the software development process. "Successful projects often are the result of successful organization and communication. Bugzilla helps reduce downtime, increase productivity, raise customer satisfaction, and improve communication.