The following three interesting programs used to be paid but recently turned Freeware: Bufferzone Pro, Chasys Draw IES, and WinX DVD Author.
Bufferzone Pro is a virtualization/Sandboxing program, Chasys Draw IES is a bitmap image editor, and WinX DVD Author is a DVD authoring app.
A 64 bit compatible version is (still) promised; look for a Freewaregenius review of this program when it finally arrives.
Also includes an image viewer and image conversion components. If you know your freeware bitmap editors and want to review this program on Freewaregenius please email me.
3. WinX-DVD-Author: a DVD authoring app that can convert all sorts of video file formats, add menus and subtitles, and burn to DVD.
Supported formats include: MKV, M2TS, M4V, MP4, FLV, MPEG, MOV, RM, RMVB, H.264, and AVI.
If you know of any noteworthy programs that were paid and recently turned freeware please email me and let me know, and I may write them up.