Classic99 v3.20 is released.Classic99 is a freeware TI-99/4A emulator for Windows 9x.

Classic99 runs most stuff fine:
-System ROMs and many cartridges are INCLUDED under license from Texas Instruments
-boots and runs all console OS functions (except cassette I/O) and TI BASIC correctly
-most modules seem to work fine
-XB/Atarisoft cartridge bank switching supported
-all three music channels emulated through any DirectSound compatible sound card
-noise channel fully emulated, though user-defined repeat rates are not 100% accurate
-Speech implemented for both speech ROMs and external speak
-keyboard CRU scanning implemented
-joystick support
-9901 timer supported
-partial disk support
-DirectX Windowed and FullScreen, as well as non-DirectX windowed modes.
-Sprite collision detection (by pattern)
-Numerous video filter options (HQ4X, 2xSAI, SuperEagle, NTSC, etc)
-Integrated debugger with single step
-PS/2 keyboard emulation built-in
-Mouse-driven menu selection (double-click on screen)
-1MB Super AMS card supported
-Open Source and 100% free

Download: Classic99 v3.21
Source:Here