Xmind, FreeMind, CmapTools, yEd Graph Editor, TheBrain, LibreOffice - Draw, TreeSheets, Wondershare EdrawMind, AskSam, Flying Logic, Axon Idea Processor, Visual Understanding Environment, ThinkComposer, PMM - Personal Memory Manager, Southbeach Modeller, NodeMind, Heimer are some alternatives to Aibase.