Yes, both Lucidchart and Clockk offer a Free Trial.
Lucidchart is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Clockk is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Lucidchart Starts at $0 whereas for Clockk Starts at $15/User/Month when Billed Yearly.
Some top alternatives to Lucidchart includes Miro, FigJam, SmartDraw, Gliffy, Microsoft Visio, Creately, EDraw Max, DrawSQL, Quick Diagram, diagrams.net, Lucidscale and HackerDraw.
Some top alternatives to Clockk includes Timely, My Hours, Hubstaff, Timesheets.com, TrackingTime, Clockify, TimeTrack, Timebase, Time Track Bill and Timesheet.