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 | 09/10 | 08/10 | 07/10 | 06/10 | 05/10 | 04/10 | 03/10 | 02/10 | 01/10 | 12/09 | 11/09 | 10/09 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| cplusplus.com | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 |
| Cyrus | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Debian | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| FSF | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 | 0 |
| FSF India | 0 | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| GCompris | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Gentoo | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| GIMP | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| GIT | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| gNewSense | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| GNOME | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 4 | 1 | 1 | 1 | 1 |
| 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 | 1 | 0 | 0 | 0 | 1 | 0 | 12 | 11 | 12 | 12 | 12 |
| LinuxCabal | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Mozilla | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 |
| MySQL | 0 | 0 | 0 | 0 | 0 | 10 | 7 | 10 | 11 | 30 | 0 | 0 |
| NetBSD | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| OpenSuse | 0 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| PHP | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| phpLDAPadmin | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| phpMyAdmin | 0 | 0 | 0 | -1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| PostgreSQL | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0 | 1 | 1 | 1 | 1 |
| Python | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |
| Ruby | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
| SAMBA | 0 | 0 | 0 | 0 | 13 | 8 | 7 | 5 | 4 | 4 | 4 | 5 |
| SourceForge | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 3 |
| Squid | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12 |
| W3C | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wikipedia | 0 | -1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 9 | 9 | 53 |
| Xmarts | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11 | 11 |
| Courier | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 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 |
| LaTeX | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Linvox | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| MPlayer | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Novell | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 |
| OpenVPN | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 21 | 16 | 16 | 16 |
| Perl | 1 | 1 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 0 | 3 | 3 |
| Ubuntu | 1 | 1 | 1 | 0 | 22 | 3 | 3 | 3 | 3 | 3 | 2 | 36 |
| Apache | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 4 | 5 | 1 | 1 |
| cdrecord | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | -1 |
| ClamAV | 2 | 2 | 2 | 2 | 2 | 89 | 80 | 80 | 80 | 80 | 80 | 80 |
| CTAN | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Fedora | 2 | 3 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| FLISoL | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 28 | 28 | 28 | 28 |
| Mutt | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| OpenOffice.org | 2 | 3 | 8 | 8 | 8 | 30 | 30 | 30 | 6 | 6 | 6 | 6 |
| Opera Software | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| OSI | 2 | 2 | 3 | 0 | 3 | 3 | 2 | 2 | 2 | 3 | 3 | 3 |
| Qt | 2 | 2 | 2 | 2 | 2 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
| Step One Group | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| ENLi | 3 | 3 | 26 | 26 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| FSF Europe | 3 | 3 | 4 | 3 | 3 | 3 | 1 | 1 | 0 | 0 | 0 | 0 |
| Linux | 3 | 3 | 3 | 3 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 |
| phpPgAdmin | 3 | 3 | 3 | 3 | 3 | 3 | 1 | 3 | 3 | 3 | 3 | 3 |
| Postfix | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 0 |
| Procmail | 4 | 4 | -1 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| ISC | 5 | 5 | 7 | 7 | 8 | 8 | 7 | 5 | 5 | 5 | 5 | 5 |
| OpenBSD | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| RedHat | 5 | 5 | 7 | 7 | 7 | 7 | 0 | 0 | 0 | 0 | 14 | 0 |
| CONSOL | 6 | 6 | 6 | 6 | 6 | 26 | 26 | 26 | 26 | -1 | 26 | 26 |
| mc | 6 | 6 | 6 | 6 | 6 | 6 | 0 | 0 | 0 | 0 | 0 | 0 |
| OpenSSH | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| w3m | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| IETF | 7 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 6 | 6 | 6 |
| OpenSSL | 8 | 8 | 8 | 8 | -1 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| ProFTPd | 8 | 8 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Saisamx | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 |
| Xandros | 8 | 8 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 25 | 25 |
| FSL | 9 | 5 | 24 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 |
| GUSLY | 9 | 9 | 9 | 15 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | -1 |
| Knoppix | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| Xorg | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| FOSDEM | 10 | 13 | 28 | 27 | 27 | 27 | 27 | 2 | 10 | 12 | 9 | 3 |
| GULEV | 10 | 10 | 10 | 3 | 41 | 41 | 52 | 45 | 9 | 11 | 11 | 9 |
| OpenSolaris | 10 | 10 | 15 | 14 | 14 | 14 | 14 | 16 | 12 | 11 | 24 | 101 |
| Freshmeat | 11 | 11 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 |
| Mandriva | 12 | 12 | 12 | 12 | 12 | 12 | 8 | 8 | 53 | 53 | 52 | 62 |
| GulMore | 13 | 13 | 13 | 13 | 14 | 14 | 0 | 0 | 0 | 0 | 0 | 1 |
| LTSP | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Exim | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| OpenLDAP | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| ReactOS | 15 | 15 | -1 | -1 | 15 | 15 | 15 | 12 | 12 | 12 | 12 | 12 |
| Trulinux | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| VIM | 15 | -1 | 15 | 15 | 17 | 17 | 17 | 15 | 15 | 13 | -1 | 13 |
| FreeRadius | 16 | 16 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 33 | 33 | 33 |
| Linux Mérida | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Sendmail | 16 | 16 | 26 | 26 | 26 | 26 | 57 | 57 | 57 | 57 | 57 | 57 |
| Turbolinux | 17 | 17 | -1 | 46 | 46 | 17 | 37 | 372 | 372 | 372 | 372 | 372 |
| Aullox | 19 | 19 | 40 | 0 | 40 | 40 | 40 | 40 | 40 | -1 | 40 | -1 |
| WINE | 19 | 18 | 18 | 7 | 9 | 10 | 11 | 10 | 9 | 9 | 8 | 4 |
| GLUCH | 20 | 20 | 41 | 41 | 41 | 41 | 41 | 49 | 29 | 29 | 29 | 85 |
| Ulfix | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Nagios | 22 | 30 | 59 | 59 | 71 | 58 | 69 | 68 | 68 | 79 | 83 | 101 |
| GLP | 24 | 24 | 52 | 8 | 35 | 42 | 36 | 36 | 40 | 40 | 52 | 52 |
| phpGroupWare | 26 | 26 | 9 | 38 | 52 | 52 | 56 | 56 | 56 | 56 | 56 | 56 |
| GLO | 28 | 28 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 344 |
| RFC Editor | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| CentOS | 31 | 31 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 |
| softwarelibre.gob.mx | 32 | 32 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 |
| 35 | -1 | 40 | 36 | 40 | 40 | 47 | 40 | 44 | 45 | 41 | 42 | |
| Subversion | 35 | 35 | 68 | 42 | 42 | 42 | 42 | 46 | 42 | 42 | 42 | 42 |
| Slackware | 38 | 38 | 38 | 38 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 |
| Nucleum | 46 | 50 | 84 | 84 | 84 | 84 | 84 | 77 | 77 | 77 | 78 | 78 |
| GTK+ | 47 | 47 | 62 | 62 | 62 | 47 | 47 | 47 | 47 | 47 | 47 | 47 |
| Informática Integral | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 49 |
| Cofradia | 51 | 32 | 49 | 46 | 21 | 26 | 41 | 36 | 20 | 15 | 17 | 14 |
| QMail | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 |
| Linux Journal | 61 | 61 | 69 | 69 | 73 | 73 | 74 | 65 | 58 | 55 | 78 | 77 |
| Linux y Linux | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 |
| Slashdot | 67 | 65 | 65 | 65 | 66 | 65 | 68 | 62 | 51 | 52 | 52 | 61 |
| Asterisk | 74 | 74 | 126 | 73 | 73 | 64 | 69 | 29 | 36 | 36 | 36 | 6 |
| FreeCiv | 85 | 15 | 11 | 11 | 30 | 30 | 30 | 10 | 22 | 18 | 13 | 13 |
| k3b | 94 | 88 | 91 | 59 | 65 | 71 | 71 | 71 | 75 | 69 | 70 | 64 |
| Webmin | 102 | 120 | 173 | 201 | 207 | 191 | 196 | 190 | 192 | 187 | 183 | 139 |
| Hewlett Packard | 103 | 112 | 109 | 113 | 121 | 128 | 130 | 124 | 115 | 120 | 107 | 102 |
| Microsoft | 104 | 104 | 362 | 355 | 355 | 358 | 360 | 391 | 395 | 295 | 296 | 292 |
| Debian México | 119 | 111 | 178 | 180 | 205 | 203 | 203 | 200 | 200 | 211 | 209 | 231 |
| HowtoForge | 147 | 146 | 366 | 363 | 359 | 347 | 326 | 343 | 369 | 328 | 338 | 325 |
| SUN | 351 | 338 | 546 | 545 | 310 | 165 | 205 | 152 | 32 | 32 | 32 | 32 |
| DistroWatch | 721 | 718 | 732 | 704 | 696 | 705 | 724 | 719 | 1503 | 1644 | 1611 | 1581 |
| Compugraf | -1 | -1 | -1 | 58 | 59 | 59 | 59 | 48 | 48 | 48 | 48 | 48 |
| Opencmasc | -1 | -1 | -1 | -1 | 1 | 1 | 1 | 164 | 164 | 164 | 164 | 164 |