DVD authoring with menus
Gui For Dvdauthor/Gui For Muxman
DVD burning
Burn DVD image files(.iso): ImgBurn
Audio
Add naration or music to specific points in slideshow: DubIt
Edit audio: Audacity
Join more mp3/wav files into one: MediaJoin
Effects
Coding effects(or use the DsG included templates): Avisynth
Free Frame filters: freeframe.sourceforge.net/
Avisynth/Virtual Dub filters: MSU
Backgrounds
Make you own looping motion backgrounds: Axogon Mutator
Great backgrounds(color search too): customize.org/wallpapers
Subtitles conversion
Convert srt files to GUI for Muxman friendly sup: txt2sup
Making covers for DVDs
Image manipulation
AVS conversion
Convert avs files into anything including svcd, vcd, avi: WinFF
Join mpgs: MediaJoin
Other
Make your own software: wxBasic
Coding video manipulation: Avisynth
The host of this software: Videohelp
Note: DVD slideshow GUI is a user interface for great free tools like Avisynth, Dvdauthor, HCenc, Media Player Classic, FFmpeg, Flvtool2, Mplex, Demux, mkisofs ect. and is coded in wxBasic. It comes as an installer with all the nessesary files included.