COSMO: Accelerated ADMM-based solver for convex conic optimisation problems (LP, QP, SOCP, SDP, ExpCP, PowCP). Automatic chordal decomposition of sparse semidefinite programs.
Julia interface for OSQP: The Operator Splitting QP Solver
SwitchTimeOpt.jl - Switching Time Optimization in Julia
A free LDL factorisation routine (Julia implementation)