What are the best tools to design gRNAs in a high-throughput way for a CRISPR screen, e.g. targeting all protein-coding genes in a genome? I would like to take into account possible off-target effects, as well as to allow for flexibility in the PAM sequence, to have the possibility of using non-canonical PAMs.
I'm aware of CRISPRseek, but I'm afraid it might be quite slow to run for a genome-scale search.