ORSEE sign
ONLINE RECRUITMENT SYSTEM FOR ECONOMIC EXPERIMENTS
ORSEE logo
THE EASE OF RECRUITMENT
ORSEE Documentation
A general description of ORSEE can be found here:

Ben Greiner (2015), Subject Pool Recruitment Procedures: Organizing Experiments with ORSEE, Journal of the Economic Science Association 1 (1), 114-125.

This is the paper that you need to cite when you use ORSEE to recruit subjects (see the License).

Another paper that discusses methodlogical issues of subject recruitment and best practices is the chapter by Greiner and Stephanides in the Handbook of Research Methods and Applications in Experimental Economics (2019).

Detailed technical documentation of ORSEE can be found in the ORSEE WiKi on GitHub.

Here you find the short installation notes and upgrade notes that come with ORSEE 3.