Bitbucket, Travis CI, Redmine, Microsoft Project, Kanban Tool, CloudForge, NotABug.org, Sourcegraph, Drone.io, Bitrise, GitBucket, ProjectLocker, Bitbucket Pipelines, BerliOS, SchoolForge.net, Sprintly, Indefero, Codesion, srchub are some alternatives to Assembla.