En un mundo de protocolos y estándares propietarios el software libre - sin poder intercambiar datos con otros programas y sistemas - tendría poca importancia. Por eso promover software libre significa también promover protocolos y estándares libres y abiertos.
Esta página hace la prueba examinando el HTML - un estándar abierto, definido y publicado por el W3C - usando el Validator del W3C.
Se prueban una vez al mes las páginas web principales de más de cien proyectos, organizaciones y empresas del sector de TI con enfoque a la comunidad de software libre. ¿Usan el HTML estándar o una versión propietaria de HTML? ¿Cómo se pinta el tornasol virtual en contacto con el website? ¿Verde, amarillo o rojo?
En la primera columna vienen los nombres con ligas a los websites y en la segunda los números de errores del mes actual que marcó el Validator.
| Nombre | 05/12 | 04/12 | 03/12 | 11/09 | 10/09 | 09/09 | 08/09 | 07/09 | 06/09 | 05/09 | 04/09 | 03/09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Debian | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| FSF India | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Gentoo | 0 | 0 | 0 | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 0 | 0 |
| gNewSense | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| GNOME | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| GTK+ | 0 | 0 | 0 | 47 | 47 | 34 | 25 | 38 | 15 | 39 | 55 | 24 |
| IANA | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| IBM | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| KDE | 0 | 0 | 0 | 12 | 12 | 12 | 11 | 0 | 0 | 0 | 0 | 0 |
| LibreOffice | 0 | 0 | ||||||||||
| Linux | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| LinuxCabal | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 0 | 0 |
| MySQL | 0 | 0 | 0 | 0 | 0 | 16 | 13 | 16 | 7 | 6 | 9 | 9 |
| Opera Software | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 | 0 | 0 |
| Postfix | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| PostgreSQL | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 |
| Ruby | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 9 |
| Step One Group | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Ubuntu | 0 | 1 | 0 | 2 | 36 | 44 | 44 | 52 | 9 | 9 | 8 | 4 |
| W3C | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Courier | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 5 |
| cplusplus.com | 1 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 7 | 7 |
| FreeBSD | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| FSF Latin America | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Mozilla | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MPlayer | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| NetBSD | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Novell | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Nucleum | 1 | 1 | 1 | 78 | 78 | 76 | 76 | 76 | 76 | 76 | 76 | 87 |
| OpenOffice.org | 1 | 0 | 0 | 6 | 6 | 6 | 4 | 4 | 4 | 0 | 0 | 0 |
| OpenSuse | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| PHP | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Python | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0 |
| cdrecord | 2 | 2 | 2 | 2 | -1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| ClamAV | 2 | 2 | 2 | 80 | 80 | 80 | 80 | 80 | 64 | 68 | 68 | 84 |
| Debian México | 2 | 2 | 2 | 209 | 231 | -1 | 246 | 233 | 179 | 148 | 266 | 271 |
| FLISoL | 2 | 3 | 3 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 42 | 43 |
| FOSDEM | 2 | 12 | 12 | 9 | 3 | 1 | 5 | 4 | 21 | 21 | 21 | 20 |
| FSF Europe | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 0 |
| Linux y Linux | 2 | 2 | 2 | 65 | 65 | 65 | 65 | 65 | 65 | 64 | 64 | 64 |
| Mutt | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| OpenSolaris | 2 | 2 | 2 | 24 | 101 | 72 | 166 | 171 | 205 | 199 | 183 | 191 |
| Squid | 2 | 2 | 2 | 0 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Compugraf | 3 | 3 | 3 | 48 | 48 | 48 | 55 | 54 | 44 | 46 | 43 | 48 |
| ENLi | 3 | 3 | -1 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| LaTeX | 3 | 3 | 3 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| phpLDAPadmin | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 |
| Perl | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Procmail | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| SourceForge | 4 | 1 | 1 | 3 | 3 | 16 | 18 | 5 | 204 | 88 | 87 | 87 |
| Exim | 5 | 5 | 5 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| FSF | 5 | 5 | 5 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| OpenBSD | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| CONSOL | 6 | 6 | 6 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 24 | 22 |
| OpenSSH | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| phpGroupWare | 6 | 6 | 6 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 |
| w3m | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| IETF | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 25 | 25 | 24 | 33 | 32 |
| OpenSSL | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| Saisamx | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Xandros | 8 | 8 | 8 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 23 |
| CTAN | 9 | 9 | 9 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Freshmeat | 9 | 9 | 9 | 21 | 21 | 22 | 46 | 46 | 48 | 48 | 44 | 9 |
| GUSLY | 9 | 9 | 9 | 0 | -1 | 0 | 38 | 18 | 18 | 18 | 18 | 11 |
| Knoppix | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Qt | 9 | 9 | 9 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 |
| Xorg | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| GIMP | 10 | 10 | 10 | 0 | 0 | 0 | 0 | 5 | 5 | 5 | 8 | 5 |
| WINE | 10 | 10 | 10 | 8 | 4 | 2 | 1 | 8 | 8 | 8 | 8 | 7 |
| GLUCH | 11 | 11 | 11 | 29 | 85 | 85 | 103 | -1 | 346 | 346 | 346 | 346 |
| mc | 11 | 11 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| phpMyAdmin | 11 | 13 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| softwarelibre.gob.mx | 11 | 11 | 11 | 80 | 80 | 80 | 80 | 80 | 80 | 84 | 84 | 84 |
| Apache | 12 | 12 | 10 | 1 | 1 | 1 | 1 | 3 | 3 | 3 | 3 | 0 |
| ISC | 12 | 11 | 11 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| ReactOS | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 17 | 19 | 28 | 28 | 28 |
| Sendmail | 12 | 12 | 12 | 57 | 57 | 57 | 57 | 57 | 32 | 32 | 32 | 32 |
| GulMore | 13 | 13 | 13 | 0 | 1 | 1 | -1 | 1 | 1 | 1 | 1 | 1 |
| LTSP | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Xmarts | 13 | 13 | 13 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| FreeRadius | 14 | 14 | 14 | 33 | 33 | 32 | 32 | 7 | 7 | 28 | 28 | 9 |
| OSI | 14 | 12 | 8 | 3 | 3 | -1 | 3 | 3 | 3 | 3 | 3 | 3 |
| OpenLDAP | 15 | 15 | 15 | 15 | 15 | 18 | 18 | 15 | 15 | 15 | 13 | 13 |
| ProFTPd | 15 | 15 | 15 | 10 | 10 | 10 | 10 | 10 | 16 | 16 | 16 | 6 |
| Trulinux | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| Fedora | 16 | 16 | 16 | 0 | 0 | |||||||
| GIT | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Linux Mérida | 16 | 16 | 16 | 16 | 16 | 1 | 1 | 1 | 258 | 202 | 483 | 478 |
| VIM | 16 | 16 | 16 | -1 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Linux Journal | 18 | 17 | 17 | 78 | 77 | 66 | 68 | 73 | 77 | 71 | 89 | 74 |
| Aullox | 19 | 19 | 19 | 40 | -1 | 40 | 40 | 40 | 40 | 40 | 40 | 40 |
| Mandriva | 19 | 19 | 19 | 52 | 62 | 39 | 38 | 24 | 24 | 13 | 5 | 5 |
| GULEV | 20 | 20 | 20 | 11 | 9 | 8 | 1 | 9 | 94 | 94 | 94 | 94 |
| Turbolinux | 20 | 20 | 19 | 372 | 372 | 372 | 372 | 370 | 370 | 370 | 370 | 385 |
| Cyrus | 23 | 23 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| GCompris | 23 | 23 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| SAMBA | 24 | 0 | 0 | 4 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| FreeCiv | 25 | 34 | -1 | 13 | 13 | 11 | 3 | 18 | 46 | 37 | -1 | 41 |
| OpenVPN | 27 | 27 | 27 | 16 | 16 | 16 | 16 | 16 | 16 | 3 | 21 | 21 |
| Ulfix | 27 | 27 | 27 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| GLO | 28 | 28 | 28 | 1 | 344 | 3675 | 3720 | 3720 | 3720 | 3720 | 0 | 0 |
| CentOS | 29 | 29 | 29 | 99 | 99 | 98 | 99 | 191 | 165 | 165 | 165 | 165 |
| RFC Editor | 31 | 31 | 31 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| 34 | 34 | 36 | 41 | 42 | 39 | 40 | 40 | 45 | 41 | 43 | 65 | |
| Nagios | 35 | 37 | 37 | 83 | 101 | 76 | 87 | 77 | 42 | 46 | 37 | 37 |
| Subversion | 36 | 36 | 36 | 42 | 42 | 44 | 44 | 44 | 44 | 44 | 44 | 44 |
| Informática Integral | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 |
| RedHat | 51 | 47 | 47 | 14 | 0 | 0 | 0 | 0 | 16 | 18 | 0 | 0 |
| Cofradia | 54 | 66 | 66 | 17 | 14 | 18 | 30 | 31 | 29 | 43 | 38 | 33 |
| QMail | 55 | 55 | 55 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 |
| CISOL | 59 | 55 | ||||||||||
| Slashdot | 59 | 62 | 61 | 52 | 61 | 50 | 30 | 33 | 24 | 26 | 86 | 154 |
| Wikipedia | 60 | 5 | 5 | 9 | 53 | 0 | 0 | 0 | 0 | 0 | 0 | 6 |
| k3b | 83 | 83 | 83 | 70 | 64 | 64 | 64 | 57 | 57 | 54 | 51 | 47 |
| Hewlett Packard | 85 | 49 | 56 | 107 | 102 | 102 | 105 | 109 | 99 | 96 | 105 | 91 |
| Asterisk | 88 | 89 | 89 | 36 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 |
| Webmin | 104 | 105 | 105 | 183 | 139 | 138 | 149 | 167 | 181 | 189 | 194 | 145 |
| HowtoForge | 118 | 122 | 116 | 338 | 325 | 318 | 338 | 253 | 239 | 244 | 236 | 264 |
| Microsoft | 189 | 191 | 254 | 296 | 292 | 305 | 292 | 219 | 193 | 179 | 188 | 176 |
| SUN | 338 | 324 | 324 | 32 | 32 | 29 | 29 | 29 | 29 | 29 | 37 | 36 |
| DistroWatch | 768 | 783 | 779 | 1611 | 1581 | 1564 | 1542 | 1597 | 1606 | 1577 | 1561 | 1517 |
| FSL | -1 | -1 | -1 | 21 | 20 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| GLP | -1 | -1 | -1 | 52 | 52 | 52 | 52 | 52 | -1 | -1 | -1 | 44 |
| Linvox | -1 | -1 | -1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Opencmasc | -1 | -1 | -1 | 164 | 164 | 164 | 164 | 164 | 164 | 164 | 164 | 164 |
| Slackware | -1 | 42 | -1 | 44 | 44 | 44 | 42 | 42 | 39 | 36 | 36 | 36 |
| phpPgAdmin | -1 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |