• ECube EZFA - RTC and multi boot cable linker.
• Extreme Flash Advance - mini USB port on the cart.
• EZ-Flash 2 PowerStar - energy saving plus rtc, cheat codes and nes, gb/gba, pce and zx rom support.
• EZ-Flash III 3 - new generation ezflash cart but is it better? 2 separate memory banks and good software.
• EZF-Advance Card - ezfa cartridge and ez flash advance linker are popular for being the first RTC set.
• Flash 2 Advance ULTRA - greatly improved f2a card with quick save and restore buttons
• G6-Flash Card - newcomer in the flash market with ok software, g6 PDA soft and card with nand and nor mem.
• GB-Bridge for Flash2Advance - adapter for using F2A cards on GB COLOR and/or playing GB GBC roms on GBA
• GBA Movie Player - designed for playing movies, mp3 and ebooks but can be used to play nes roms and small gb games.
• GBA Super Card - new Compact Flash adapter for GBA and Nintendo DS similar to movie player but can play GBA roms.
• GBA X-ROM Flash - xrom - cheapest 512Mb set that has RTC, Cheats Codes, nes, snes, gb/gbc pce and PogoShell support.
• Nintendo Play-Yan - original MP3 and MPEG4 player for GBA SP and NDS with support for small games playing.
• GBA QBus QBoy - 2in1 flash writer that doubles as game pad and QBoy software that allows download gba roms free.
• XG-Flash 2 Turbo 2005 - external miniature USB writer model for XG2T cards. Makes XGflash Nintendo DS compatible.
• XG-Flash Card - great design with rtc, super memory stick for save game management and good linker /  writer.

You can buy GBA Flash Memory Cards in following on-line stores:

• EasyBuy2000.com
• ConsoleSource.com
• Divineo.com
• Jandaman.com
• Linker4U.com
• Merconnet.com