Robinson averaged 13.2 points and 4.4 assists per game last season for the Chicago Bulls, but upped his averaged to over 16 points a game during the Bulls playoff run. His contract with the team expired at the completion of the 2012-13 season.
Robinson has had two different stints with the Knicks, first playing his first four seasons with the team after being drafted in the 1st round of the 2005 Draft and playing 30 games with the team in the 2009-10 season.
More from ESPN.com:
The market for guard Nate Robinson is likely to expand as free agency approaches its third week, but the identity of at least one suitor for Robinson is clear.
Sources close to the situation said Saturday that the Denver Nuggets have registered their interest in Robinson, who ranks as one of the most attractive free agents still available after his playoff scoring binges for Chicago. The prospect of a return to Chicago appears increasingly unlikely. Sources say that the reluctance of Bulls coach Tom Thibodeau to bring Robinson back -- with Derrick Rose returning -- is expected to lead Robinson elsewhere.