Open access journals With the advent of internet (and common sense) there is more and more demand for open-access research. Several researchers (including me) find it frustrating that published peer-reviewed research articles are behind paywalls. I am looking for journals and conferences (related to theoretical computer science, graph theory, combinatorics, combinatorial optimization) that make all accepted publications freely available to everyone.

Some such journals are Theory of Computing, The Electronic Journal of Combinatorics, Logical Methods in Computer Science

If you know more such journals (or) conferences, please mention them in your answers.

EDIT : As suggested by David Eppstein in his answer, I am adding one more constraint. Please write only those journals/conferences that do not charge authors exorbitant fees to publish.
Conferences with proceedings published in the LIPIcs series:


STACS
FSTTCS
CCC (since 2015)
TQC (Theory of Quantum Computation, Communication and Cryptography)
ICALP
APPROX/RANDOM
SoCG
SWAT
ESA
MFCS