The RNAi Web
The RNAi Web - Resource center for RNA interference technology. It offers scientific and technical information on RNAi technology, guidelines and tips on siRNA design, and also collects RNAi related web resources

RNAi.net
Informative site on RNA interference and related issues: manufacturers, interviews, resources.

Allele Biotech
Supplier of custom synthetized oligonucleotides, particularly RNAi.

Ambion, Inc.
Develops and sells RNA-based life science research and molecular biology products, particularly related to RNA inhibition.

Dharmacon
Produces and sells chemically synthesized oligonucleotides, particularly RNAi-related products.

GenScript Gene Synthesis and siRNA Services
Custom gene synthesis, particularly of siRNA related oligonucleotides.

Proligo
Supplies DNA and RNA synthesis reagents particularly for RNA inhibition research.

Quiagen
Products for investigation of gene silencing and RNA inhibition.

RiboBioscience
Synthesis of natural and unnatural RNA particularly for investigation of RNA inhibition and gene silencing.

RNA -tec
Custom synthesis of nucleotides particularly RNAi for investigation of RNA inhibition and gene silencing.

Midland Certified
Oligonucleotides particularly for RNA inhibition studies.

Mirus Bio Corporation
siRNA for in vitro and in vivo investigational use.

Superarray
siRNA, PCR and microarrays.

How RNA Interference Works
Diagrams explaining how RNAi causes gene silencing.

Gene silencing by RNAi
An animation from Nature Publishing Group on the mechanism of RNA interference.

RNAi News
Newsletter on RNA interference and related matters.

RNAi Database
Contains all siRNA from C. elegans including assay, resulting phenotypes, dsRNA target location.

WormBase
Data bases on the genetics of C elegans and related nematodes.

siRNA database
Listing published siRNA:s with literature reference for each.

Tronolab siRNA Database
Short table of published siRNA:s with species, sequence and literature reference.

RNAi@elegansNet
Directory on gene silencing by RNA interference (RNAi) literature and resources (not only C. elegans).