Open Source Soft- and Hardware development of scientific MR methods in the construction of low-field MR technology has gained tremendous speed over the last years. As of today, it is possible to build an entire low-field MR system mostly relying on Open Source Software and Hardware designs. This is encouraging, since transparency, reproducibility and non-exclusive sharing of results are the core scientific values driving innovations and impact. In this presentation the current progress of open source low-field MR development is displayed: From pulse sequence to pulse generation hardware, amplifiers, magnets, RF and gradient coils.