Trello, monday.com, Redmine, Todoist, OpenProject, Workflowy, ClickUp, TickTick, Focalboard, Zenkit, Quire, Craft.io, Remember The Milk, SuiteDash, Preview App, Portfolio for Jira, Agantty, Pagico, Runrun.it, Project.net, CollectDocs.com, ArchiOffice, YuktiPro.com, ProsperWorks, ADIOS Business Suite, Taskmenizer, Essomenic ServiceVisor, Tadagraph, YouProjects, Project Planning Pro, Kenja, FossLook, parolu are some alternatives to GQueues.