I've been using Upwork for side gigs since it was Odesk. The tracking system (which has scarcely changed in 5+ years) has always seemed fair and flexible to me.

I've been using Upwork for side gigs since it was Odesk. The tracking system (which has scarcely changed in 5+ years) has always seemed fair and flexible to me. the tracker works well cross platform.. I can move from OSX to Win10 to Ubuntu (previously they supported Debian, and in the past I've managed to get it tracking successfully on Slackware) .. minimal downtime, good communication from their engineers. Being able to selectively trim the fat from my diary in 10 min increments on Sunday night is helpful in preparing clean weekly reports and reviewing my own workweek.