pyqgis - QGIS Plugins & Tools that replicate Select ArcPy Tools

I developed a complex python application for road generation from GPS Devices that uses a few Arcpy Tools.

I want to try and replicate this Applications functionality using a freeware like PyQGIS instead of Arcpy, but in order to do this I need to find tools & plugins from QGIS that mimic the following tools:

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  arcpy.da.SearchCursor

  
  


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  arcpy.TableToTable_conversion

  
  


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  arcpy.JoinField_management

  
  
  
  
  
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    arcpy.MakeQueryTable_management

    
    
  
  
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    arcpy.Delete_management

    
    
  
  
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    arcpy.AddField_management

    
    
  
  
  
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    arcpy.CalculateField_management

    
    
  
  
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    arcpy.MakeXYEventLayer_management

    
    
  
  
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    arcpy.CopyFeatures_management

    
    
  
  
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    arcpy.PointsToLine_management, QGIS Points to Path: http://spatialgalaxy.net/2011/12/30/qgis-plugin-of-the-week-points-to-paths/

    
    
  
  
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    arcpy.Intersect_analysis

    
    
  
  
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    arcpy.SpatialJoin_analysis

    
    
  
  
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    arcpy.MakeFeatureLayer_management

    
    
    
  
  
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    arcpy.SelectLayerByAttribute_management

    
    
  
  
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    arcpy.LayerToKML_conversion

    
    
  
  
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    arcpy.ApplySymbologyFromLayer_management

    
    
  
  
  
  
  

  I am also researching this and will post the matching tools in the question as I find them to help anyone who is having similar issues, once all Arcpy tools have a matching PyQGIS tool or plugin I will accept an answer with them all in it, If an answer has at least 1 matching tool I will upvote, but no answer will be accepted until each arcpy tool has a matching PyQGIS