Creating reports is not very easy with VB.net or C# especially if your are using express editions. Visual Studio Professional provides Crystal reports which is a design time report designer.
LNSoft Report Designer is an application that can be integrated in an application so that reports can be edited at runtime.
tvcalc is a free software that allows to know the total length of n number of videos and the total size of the resulting files according to the video bitrate and audio bitrate. NET 3.5 SP1 runtime and NET 4.0 Full runtime must be installed.
The Abluescarab Designs Alarm is a free, easy-to-use alarm program that you can set to a specified time either in either 24-hour display or 12-hour display. This program requires the .NET runtime.
This program is completely open source (GPL), using Google translate api makes the process of translation between 89 (Eighty-nine) languages. it has a useful interface. Requires .NET 3.5 or above framework runtime library.