Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 775 629
2) Placement test : grammar for beginners (anonyme) 5 987 345
3) A/AN (webmaster) 5 362 372
4) Auxiliary BE (webmaster) 3 222 847
5) Present continuous (webmaster) 2 997 511
6) Present simple (webmaster) 2 908 886
7) Present simple (webmaster) 2 595 798
8) Present continuous (webmaster) 2 430 975
9) Adjectives (webmaster) 2 092 702
10) A/an (anonyme) 2 013 721
11) Present perfect simple (webmaster) 1 640 172
12) Preterite (webmaster) 1 623 730
13) Vocabulary - Placement test (bridg) 1 618 496
14) Preterite (webmaster) 1 444 775
15) Short placement test (webmaster) 1 442 858
16) To be (bridg) 1 405 316
17) What time is it? (webmaster) 1 348 343
18) Present perfect (webmaster) 1 343 664
19) The alphabet in English (webmaster) 1 320 242
20) Adjectives (anonyme) 1 215 080
21) What time is it? (webmaster) 1 206 692
22) Numbers (webmaster) 1 188 111
23) 'A' ou 'An' (anonyme) 1 174 298
24) Two presents: present continuous, present simple (webmaster) 1 148 310
25) To be (bridg) 1 144 821
26) Comparatives / Superlatives (webmaster) 1 101 148
27) Numbers (webmaster) 1 069 918
28) CAN / MUST (webmaster) 1 057 959
29) THE/ A / AN / nothing (webmaster) 1 032 215
30) Comparatives (webmaster) 1 006 629
31) Family life (bridg) 1 000 059
32) Numbers > 100 (webmaster) 985 911
33) Future (going to/will/present continuous) (anonyme) 962 525
34) Plural (webmaster) 955 136
35) Superlatives (webmaster) 874 382
36) Adjectives (anonyme) 874 151
37) Simple present (bridg) 853 147
38) Spelled words N°1 (bridg) 849 576
39) Placement test beginners: Check your spelling (anonyme) 829 786
40) Introducing oneself (webmaster) 826 807
41) Adverbs of frequency (anonyme) 816 299
42) Family (bridg) 784 120
43) General test-End of high school / Beginning of university (webmaster) 782 203
44) Present simple (anonyme) 779 041
45) Frequency adverbs (webmaster) 777 314
46) Present BE + Ving (bridg) 764 390
47) Genitive (webmaster) 723 119
48) Family tree (anonyme) 718 947
49) Passive form (anonyme) 717 569
50) Preterite: simple or continuous? (webmaster) 715 749
51) Placement test (beginners) (lili73) 700 422
52) Past simple or present perfect (anonyme) 692 683
53) Future (webmaster) 675 502
54) 2 Preterites (webmaster) 661 251
55) Present perfect simple (bridg) 659 153
56) Preterite (webmaster) 619 493
57) List of 200 irregular verbs and audio (bridg) 615 478
58) Modals (webmaster) 612 351
59) Spelled words N°2 (bridg) 608 739
60) Height (webmaster) 606 039
61) Modals (webmaster) 604 268
62) Articles a / an / the (anonyme) 596 740
63) Plural forms (bridg) 576 887
64) Nationalities (webmaster) 573 853
65) Past continuous / Past simple (anonyme) 564 693
66) Irregular plurals (bridg) 553 116
67) Two presents: simple and continuous (webmaster) 549 157
68) Preterite (bridg) 548 439
69) Superlatives (frapedur) 536 828
70) Vocabulary: greeting people (here4u) 536 438
71) Give your opinion (bridg) 531 506
72) Adverbs of Frequency (bridg) 516 607
73) Present simple or continuous (anonyme) 509 524
74) Present perfect / preterite ? (anonyme) 507 938
75) Possessive case (anonyme) 480 208
76) Countries & nationalities (bridg) 472 963
77) 'The' or nothing? (webmaster) 470 972
78) Introducing oneself (easy) (webmaster) 470 450
79) Past tenses (bridg) 470 206
80) Passive voice (webmaster) 462 314
81) Present Simple vs. Past Simple (anonyme) 455 906
82) Questions : how to ask them (anonyme) 447 861
83) General Test II / End of high school / Beginning of universi (webmaster) 445 841
84) IN, ON, AT or TO? (webmaster) 444 630
85) Relative pronouns (webmaster) 443 767
86) Comparative of superiority (anonyme) 437 598
87) How to pronounce the final -ED? (past simple) (webmaster) 436 783
88) Relative clauses (webmaster) 422 907
89) Sounds: [h] (webmaster) 419 275
90) Comparative (anonyme) 412 789
91) A/an/Ø (bridg) 398 283
92) Future simple (anonyme) 395 703
93) Past simple (anonyme) 395 351
94) This / That / These / Those (webmaster) 392 236
95) Conditional (webmaster) 391 233
96) Passive voice (anonyme) 389 954
97) Comparing (webmaster) 387 756
98) Can / could/ may/ might (woodyrun) 379 005
99) Present perfect or past tense (anonyme) 376 524
100) Much, many, little and few (felin) 371 950
101) Personal pronouns (anonyme) 371 175
102) Preterite continuous (BE + -ING) (webmaster) 368 358
103) Some, any, no, enough, too/too much/too many (webmaster) 367 902
104) Genitive case (bridg) 367 510
105) Confusing words - Placement test (bridg) 364 405
106) Irregular verbs (webmaster) 363 181
107) Numbers from 1 to 10 (anonyme) 361 277
108) Past perfect simple, past perfect continuous (anonyme) 360 711
109) Present continuous or present simple (webmaster) 359 339
110) Present perfect or preterite? (anonyme) 355 999
111) Simple Past : regular verbs (anonyme) 352 256
112) Comparative Adjectives (bridg) 351 951
113) Who, Whom, Which, or Whose? (anonyme) 348 415
114) Past simple (video) (anonyme) 347 721
115) Past simple or past continuous (anonyme) 341 119
116) While / When (anonyme) 337 911
117) What time is it? (webmaster) 337 456
118) Modals (tinou) 336 272
119) Modal: may/might (anonyme) 333 918
120) Cardinal and ordinal numbers (anonyme) 328 470
121) The superlative (anonyme) 324 148
122) Possessive adjectives and pronouns (woodyrun) 323 854
123) How to talk about the weather (lili73) 320 855
124) Since and for (anonyme) 318 321
125) Flags (webmaster) 317 288
126) Irregular verbs (bridg) 315 676
127) Prepositions - in, on, at (anonyme) 313 920
128) Pronouns (woodyrun) 312 907
129) Tenses (anonyme) 311 532
130) Placement test 3 (webmaster) 310 196
131) Order of adjectives (webmaster) 306 345
132) Could/Couldn't (laure95) 305 607
133) Comparative (anonyme) 304 135
134) Adjectives and prepositions (anonyme) 303 887
135) Agreement Tags (webmaster) 303 823
136) Asking questions (webmaster) 302 873
137) Present perfect OR simple past? (bridg) 298 123
138) Questions in the past tense (anonyme) 297 187
139) Superlative Adjectives (bridg) 295 505
140) Uncountable nouns (webmaster) 295 368
141) Object pronouns (bridg) 294 407
142) Placement test 1 (anonyme) 292 487
143) Present simple (anonyme) 290 571
144) Passive form (anonyme) 289 682
145) Prefer/rather (bridg) 289 051
146) Can/Must/Should (laure95) 288 673
147) Past perfect (lili73) 286 893
148) Must or Have to? (woodyrun) 286 787
149) The/an/nothing (bridg) 284 899
150) To be (anonyme) 283 324
151) Vocabulary: asking and answering (here4u) 280 423
152) Can and can't (laure95) 280 234
153) Modal verbs (bridg) 277 074
154) Some / Any / no... (bridg) 270 134
155) Days of the week (bridg) 269 030
156) So / neither (anonyme) 264 207
157) Past simple (video) (anonyme) 263 494
158) Used to (bridg) 260 218
159) Should / must (anonyme) 259 197
160) Present continuous (chnawa) 259 093
161) Past tense (anonyme) 259 087
162) Vocabulary: on the phone (here4u) 258 700
163) Find out a quantity (webmaster) 258 438
164) Superlative + and adjective (anonyme) 256 960
165) Articles : a / an / the / Ø (anonyme) 255 797
166) Comparative and superlative (anonyme) 254 375
167) Numbers 1/100 (anonyme) 253 326
168) Modal can (video) (anonyme) 252 689
169) Relatives pronouns (who, which, that...) (anonyme) 247 798
170) Comparatives (anonyme) 245 999
171) Vocabulary: at the restaurant (here4u) 245 632
172) A few, a little, few, little (anonyme) 244 932
173) Would rather / would prefer to (anonyme) 244 122
174) Present continuous and the Going to form (anonyme) 242 322
175) Have something done (anonyme) 239 633
176) Should/ have to/ must (anonyme) 239 546
177) The past (webmaster) 237 706
178) Future continuous and future perfect. (felin) 237 402
179) Used to/would (woodyrun) 237 195
180) How to ask a question in English (bridg) 235 020
181) I wish, if only (felin) 233 916
182) Pluperfect (webmaster) 233 679
183) Countable or Uncountable? (webmaster) 232 944
184) Some / any (younes91) 232 080
185) Should / shouldn't (anonyme) 231 150
186) Present simple or continuous (bridg) 230 766
187) Adjectives - ing and ed (felin) 228 652
188) Hypothesis (webmaster) 227 871
189) Auxiliary BE (anonyme) 226 239
190) Articles a/an/the/0 (bridg) 226 072
191) Article The or nothing (anonyme) 225 752
192) Present perfect with Ever - never - (anonyme) 225 339
193) Present continuous OR Present simple? (bridg) 225 211
194) Must or mustn't (laure95) 224 794
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 658
196) To / in order to / so as to / so that (irish21) 219 660
197) Present perfect (bridg) 219 327
198) What time is it ? (anonyme) 217 450
199) Comparison (komiks) 217 318
200) Indirect speech (bridg) 216 021
