There are also Continuous LINQ [1][2], Bindable LINQ [3], Obtics [4] and OLinq [5], some predating Rx [6][7]. Besides OLinq they all seem no longer maintained b

There are also Continuous LINQ [1][2], Bindable LINQ [3], Obtics [4] and OLinq [5], some predating Rx [6][7]. Besides OLinq they all seem no longer maintained but in case somebody is interested in other existing implementations, there you go. Also note that they don't all solve the exact same but similar problems. [1] http://clinq.codeplex.com http://clinq.codeplex.com [2] https://github.com/ismell/Continuous-LINQ https://github.com/ismell/Continuous-LINQ [3] https://bindablelinq.codeplex.com https://bindablelinq.codeplex.com [4] http://obtics.codeplex.com http://obtics.codeplex.com [5] https://github.com/wasabii/OLinq https://github.com/wasabii/OLinq [6] https://msdn.microsoft.com/en-us/data/gg577609.aspx https://msdn.microsoft.com/en-us/data/gg577609.aspx [7] https://github.com/Reactive-Extensions/Rx.NET https://github.com/Reactive-Extensions/Rx.NET