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.

CamStudio - Open Source Screen Capture

CamStudio is able to record all screen and audio activity on your computer and create industry-standard AVI video files and using its built-in SWF Producer can turn those AVIs into lean, mean, bandwidth-friendly Streaming Flash videos (SWFs).

Snort_inline - Open Source Intrusion Detection

This modified version of Snort uses iptables instead of libpcap. Operating System: FreeBSD, Linux.

jBilling – Open Source Invoice Solutions

jBilling is a web-based enterprise billing and rating system. It manages your subscribers with automatic invoicing (email and PDF) and payment processing (credit cards, checks, direct deposit). Robust, well documented and easy to use!