X-ray spectra of 2l-3l' transitions in the elements krypton (Z = 36), zirconium (Z = 40), niobium (Z = 41) and molybdenum (Z = 42)from charge states around neon-like have been observed from Alcator C andAlcator C-Mod plasmas. Accurate wavelengths (±0.5 mÅ) havebeen determined with reference to neighbouring aluminium, silicon, sulfur,chlorine and argon lines with relatively well known wavelengths. Lineidentifications have been made by comparison to ab initio atomicstructure calculations, using a fully relativistic, parametric potentialcode. Calculated wavelengths and oscillator strengths are presented for2l-3l' transitions in neon-like ions and neighbouring Na-, Mg-, F- andO-like satellites. Electric quadrupole transitions in neon-like ions of theform 2s-3d and 2p-3p are found to be relatively bright, and theirmeasured intensities agree well with the results ofcollisional-radiative modelling. The 2p-3s magneticquadrupole transition is also relatively intense in theabsence of collisional de-excitation at tokamak densities(1013-1015 cm-3). For krypton, transitions withupper levels up to n = 9 have been observed, and themeasured wavelengths and intensities have been compared withcalculations. For some neon-like transitions with nearlydegenerate upper levels, there can be substantialconfiguration interaction which alters the line intensities.