Yes, both tabExtend and Desktop.com offer a Free Trial.
tabExtend is designed for Individuals, Medium Business and Small Business.
Desktop.com is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for tabExtend Starts at $4/Month when Billed Yearly whereas for Desktop.com Starts at $8/User/Month.
Some top alternatives to tabExtend includes Qlearly, Flowbar, Qualified, Workvivo, Tab Management, QuickTab, KnowledgeOS, Setapp, Clarity, TabsFolders and Workona.
Some top alternatives to Desktop.com includes Anywhere, Qualified, SoWork, Workvivo, Flowall, TotalCloud, Airstack, Unifize, Toby, Paper Workspace, WorkDesk and Consider.