The only programs I know of that allow merging are software applications that you purchase. Free ones like Windows Movie Maker, Video Spin and Video Pad do not allow that.
Adobe Photoshop does, and so does every other photo editor. Just Google photo editing sofware
Video editing
Home software is fully contained and allows editing without external sources. Online photo editing allows you to upload your photo to an online editing site-edit it-save on line, or download back to your computer.
Nikon Capture Nx 2 is photo-editing software that allows you to edit pictures taken with your Nikon camera, making color changing and retouching simple.
PhotoScape software is used for basic graphical editing. It allows one to perform simple editing function functions such as making colour adjustments, cutting and pasting, and resizing.
Any spreadsheet software, such as Microsoft Excel, Lotus123, Quattro Pro, Calc and others.
The Picasa application is a photo-editing software that allows a user to organize, edit and store their photos. Downloading the application allows you to access the picasa software to edit your photos.
AudioEdit Deluxe is an mp3 editing software that allows a person to convert, record, and burn their favorite mp3 files.
paint
paint
Try adobe.
Video editing software comes in all shapes and sizes, focusing on everyone from the amateur to professional video editor. Video editing software allows you to manipulate recorded videos with special text, graphics and effects. The creative applications are endless with video editing software. Most software packages for personal use allow you to save your videos in a format that is accepted by video sharing sites, such as Youtube. The price of video software varies greatly, depending on its features.