Raster Master Sprite/Map Editor for Windows 7/8/10/11

Sprite Editor - Map Editor - Sprite Animator - Sound Utility (SFXR) - Sprite Sheet Export - Sprite Sheet Import

Supports standard PNG,GIF,PCX,LBM/ILBM(amiga) Save/Open formats supported in most game libraries/engines. 

Easy Import of ready to use game assets images (Sprite Sheets/Tile Maps)

Use Sprite Export to create Sprite sheets that can be used in many game libraries.

Use the Sound Generator (SFXR) to create jump,laser,coin,explosion,powerup,hit, and jump sounds

It also generates raylib code  to include your raylib games without need for separate PNG image files.

Use Emscripten, raylib and Raster Master to create Web games in C/C++

Use QB64, raylib and Raster Master to create Windows games

Use freepascal/lazarus and Raster Master to create Windows and Linux games

Generates RGB/RGBA array code supported by many  graphic/game libraries.

For classic/retro programmers it generates Put image code that you can simply display using the PUT/PutImage command.  Supported languages compilers include: 

QuickBasic, QB64, Quick C, Turbo Pascal, freepascal, Turbo C, Turbo Basic, Power Basic, FreeBASIC, GWBASIC, BASICA, PC-BASIC

ModeX support for DOS XLIB LBM/PBM formats - Turbo C/Pascal Only

Amiga Programmers? Haven't forgotten about you either. gcc, AmigaBASIC, Amiga C, Amiga Pascal  formats also supported.

 Map Editor code can be generated for all C/Basic/Pascal compilers.

Unlimited export formats by using built-in script language. Support 8 bit computer sprite formats like C64, Atari, and colecovision

if you are looking for something simpler than Aseprite give Raster Master a try.