Add GBDK-2020, Emulicious & VSCode debug adapter, Tilemap Studio, romusage, Petris

README.md

@@ -213,7 +213,8 @@ The [To C Or Not To C](https://gist.github.com/ISSOtm/4f4d335c3fd258ad0dfc7d4d61
 
 ### Compilers
 
-- [GBDK](http://gbdk.sourceforge.net/) - A set of tools that enable to develop in **C**. Includes a set of libraries for the most common requirements and generates ready ROM files. [Documentation](http://gbdk.sourceforge.net/doc/gbdk-doc.pdf).
+- [GBDK](http://gbdk.sourceforge.net/) - A set of tools that enable to develop in **C**. Includes a set of libraries for the most common requirements and generates ready ROM files. Last updated in 2001. [Documentation](http://gbdk.sourceforge.net/doc/gbdk-doc.pdf).
+    + [GBDK-2020](https://github.com/Zal0/gbdk-2020/) - A modernized GBDK with updated SDCC toolchain (supports ROM banking), bug fixes, documentation and other improvements. Supports Windows, Linux and MacOS. [Documentation](https://zal0.github.io/gbdk-2020/api/index.html).
   - [gbdk-osx](https://github.com/x43x61x69/gbdk-osx) - Patched GBDK 2.96a for the latest compilers on macOS.
   - [gbdk-n](https://github.com/rotmoset/gbdk-n) - Aims to update the gbdk libraries to be compatible with new versions of SDCC and provide helpers for building roms. Does not support ROM banking, thus limiting ROM size to 32K.
   - [gbdk-2020](https://github.com/Zal0/gbdk-2020) - An updated version of GBDK, C compiler, assembler, linker and set of libraries.
@@ -239,6 +240,7 @@ The [To C Or Not To C](https://gist.github.com/ISSOtm/4f4d335c3fd258ad0dfc7d4d61
 - [Gambatte](https://github.com/sinamas/gambatte) - Cross-platform and accurate emulator.
 - [MetroBoy](https://github.com/aappleby/MetroBoy) - A playable, circuit-level simulation of an entire Game Boy.
 - [gbe-plus](https://github.com/shonumi/gbe-plus) - A recently rewritten emulator that has a large effort in preserving the functions of obscure accessories (such as IR link, Mobile Network GB, Barcode Boy, GB Printer, local and online GB Serial Link Cable, ... )
+- [Emulicious](https://emulicious.net/) - Emulator with useful development tools such as source level debugging for ASM and C in VS Code.([VS Code debug adapter](https://marketplace.visualstudio.com/items?itemName=emulicious.emulicious-debugger))
 
 [Complete list of open source emulators](EMULATORS.md)
 
@@ -270,6 +272,9 @@ The [To C Or Not To C](https://gist.github.com/ISSOtm/4f4d335c3fd258ad0dfc7d4d61
 - [libstdgb](https://github.com/delwink/libstdgb) - A C library of useful Game Boy operations (SDCC).
 - [Tilemap GB](https://github.com/bbbbbr/gimp-tilemap-gb) - GIMP image editor plug-in for importing & exporting GBMB and GBTD tilemaps and tilesets (as bitmap images or .GBM/.GBR files).
 - [Tilemap Helper](https://github.com/bbbbbr/gimp-tilemap-helper) - GIMP image editor plug-in for optimizing tile maps and tile sets.
+- [Tilemap Studio](https://github.com/Rangi42/tilemap-studio) - A tilemap editor for Game Boy, Color, Advance, and SNES projects. Written in C++ with FLTK. 
+- [romusage](https://github.com/bbbbbr/romusage) - Command line tool for estimating usage (free space) of Game Boy ROMs from a .map, .noi or ihx file. Works with GBDK-2020 and RGBDS
+
 
 #### Music drivers and trackers
 
@@ -415,6 +420,7 @@ Complete and open source games.
 - [Dino's Offline Adventure](https://github.com/gingemonster/DinosOfflineAdventure) - A clone of the Google Chrome offline game.
 - [dino-gb](https://github.com/rnegron/dino-gb) - Another clone of the Chrome game.
 - [Evoland.gb](https://github.com/flozz/evoland.gb) - A port of the first level of Evoland.
+- [Petris](https://github.com/bbbbbr/Petris) - A puzzle game of shapely pets for the Game Boy Color ([itch.io](https://bbbbbr.itch.io/petris))
 
 ### Demos