Magnification
Virtual Magnifying Glass Portable - A full-featured screen magnifier
Text-to-Speech (TTS)
Balabolka Portable (Freeware) - read text aloud or save to audio file
DSpeech Portable (Freeware) - read text aloud or save to audio file
Typing Assistance
Dicom Portable - word completion utility
On-Screen Keyboard Portable - Easily access an on-screen keyboard