What is Nuclex ?

The Nuclex Framework is a collection of well-designed building blocks for XNA games and other demanding applications written in .NET. These building blocks are not interconnected — you can pick what you need, mix and match with other class libraries and architect your game the way you want it.

What are the features ?

* Better Collections (Deque, PriorityQueue)
* 3D Text Rendering
* LZMA Content Compression (that’s 7-Zip’s compression)
* Arbitrary Primitive Batching (think 3D SpriteBatch)
* Rectangle Packing
* Multi-threaded Particle System
* Themeable Graphical User Interfaces
* Game State Management
* Spatial Partitioning (R-Tree, QuadTree)
* Debugging Overlays
* Collision Detection
* Automatic Vertex Declarations

From where to get it ?
You can download the Nuclex from the Codeplex site .

Free or Paid ?

It is paid application. It costs €9.95 bucks for the product.

What are the features ?

- Editor with example scripts
- More than 55 affectors, emitters, observers, handlers and renderers
- PhysX support
- Particle System LOD
- Soft particles
- Atlas texture support and atlas tool
- Manual, tutorial and API description
- And more …

New version of particle universe is just released. That is version 1.1, so if you want to check it you can do so at FXpression site.